Vocabulary
BODC-approved data storage units
| URI | http://vocab.nerc.ac.uk/collection/P06/current/ |
|---|---|
| Description | Terms approved for use by BODC to describe the measurement units for data held in its repositories. |
| Creator | British Oceanographic Data Centre |
| Modified | 2025-08-12 |
| Version Info | 149 |
| Identifier | P06 |
| Register Manager | British Oceanographic Data Centre |
| Register Owner | British Oceanographic Data Centre |
| See Also | https://github.com/nvs-vocabs/P06 |
| License | https://creativecommons.org/licenses/by/4.0/ |
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Members
| ID ↑ | Preferred Label ↑ | Definition ↑ | Date ↑ |
|---|---|---|---|
| UMKS | 10^-8 * Cubic metres per kilogram | Unavailable | 2019-01-20 |
| AMPB | Amperes | The SI base unit of electric current equal to a flow of one coulomb per second. | 2020-04-07 |
| UAQU | Angstrom squared per quantum | Scaled unit by Avagadro's number and powers of ten to m^2/mol. | 2022-12-02 |
| UAMN | Arc minutes | Unit of angle described as one sixtieth of a degree. | 2014-02-04 |
| ATKG | Atoms per kilogram | Unit based on one atom in a SI standard unit of mass. | 2020-10-08 |
| BQ11 | Becquerels | The SI derived unit of radioactivity defined as one radioactive disintegration per second. | 2019-05-30 |
| BQM3 | Becquerels per cubic metre | One radioactive disintegration per second from an SI standard unit of volume. Equivalent to millibecquerels per litre. | 2018-02-02 |
| UBQK | Becquerels per kilogram | One radioactive disintegration per second from an SI standard unit of mass of sample. | 2014-06-07 |
| UBQL | Becquerels per litre | One radioactive disintegration per second from a one part in 10^3 of the SI unit of volume (cubic metre). | 2022-12-02 |
| BQSM | Becquerels per square metre | One radioactive disintegration per second per SI unit area. | 2015-03-26 |
| BSM3 | Becquerels second per cubic metre | TBC | 2019-01-20 |
| UYGA | Billions of years before present | The length of time elapsed expressed as billions (10^9) of years between the event of interest and the year 1950 AD. | 2022-12-02 |
| BYTE | Bytes | Unavailable | 2005-09-01 |
| ULCM | Centimetres | Unit of length which is one hundredth of a metre. | 2014-02-04 |
| UVBB | Centimetres per second | Unavailable | 2003-11-05 |
| UCKA | Centimetres per thousand years | Unavailable | 2003-11-05 |
| UCST | Centistokes | The engineering unit commonly used for kinematic vicosity equivalent to 10^-6 m^2/s. | 2022-11-28 |
| UCNT | Counts | A proprietary unit for RDI ADCP instruments, which is proportional to decibels (dB) and used to measure echo intensity. Counts are converted to dB using a coefficient (Kc) for each ADCP instrument and each beam. | 2016-08-04 |
| UCPS | Counts per second | Unavailable | 2003-11-05 |
| VVCC | Cubic centimetres | Unit of volume which is equal to 1 millilitre or 10^-6 cubic metre. | 2015-01-08 |
| MCUB | Cubic metres | Unavailable | 2009-06-11 |
| CMPS | Cubic metres per second | A rate of volumetric flow of one SI unit of volume per one SI unit of time. Also known as 'cumecs'. | 2017-12-11 |
| MCS2 | Cubic metres per second squared | Unavailable | 2009-06-11 |
| UMCU | Cubic micrometres (microns) | Unavailable | 2003-11-05 |
| CUPL | Cubic micrometres per litre | A unit of volume fraction equal to one part in 10^18 over one part in 10^3 of the SI unit of volume (cubic metre). Used to express the biovolume of cells in suspension in a liquid. | 2022-11-28 |
| UCCM | Cubic microns per cubic metre | Unavailable | 2003-11-05 |
| UNVH | Cubic microns per individual per hour | Unavailable | 2003-11-05 |
| UCUM | Cubic microns per millilitre | Unavailable | 2003-11-05 |
| CMM3 | Cubic millimetres | A unit of volume defined as a cube 1 millimetre long on each edge. | 2023-04-04 |
| CMCM | Cubic millimetres per cubic metre | One part in 10^9 of the SI unit of volume in the SI unit of volume. | 2015-03-12 |
| UTAA | Days | A time interval of 24 hours or 86400 seconds. | 2014-05-06 |
| UPDB | Decibars | Unavailable | 2009-06-11 |
| DBPY | Decibars per year | A rate of change of pressure expressed in decibars over a period of an average calendar year (365.25 days). | 2017-12-08 |
| UDBL | Decibels | Unavailable | 2009-06-11 |
| UDBZ | Decibels of Z | Radar reflectivity unit. Decibels with a reference level of 1mm^6/m^3, which is equal to a cubic micron. | 2010-09-16 |
| ULDM | Decimetres | Unit of length which is one tenth of a metre. | 2019-05-20 |
| UAAA | Degrees | A degree of arc or arc degree is a unit of measurement of a plane angle defined so that a full rotation is 360 degrees. | 2020-04-07 |
| UPAA | Degrees Celsius | Unavailable | 2006-05-04 |
| DKM2 | Degrees Celsius kilogram per square metre | Derived unit for the product of the temperature in degrees Celsius and the mass density of a medium, integrated over vertical depth or height in metres. | 2017-06-22 |
| UPCC | Degrees Celsius per metre | Unavailable | 2006-05-04 |
| DCPY | Degrees Celsius per year | A rate of change of temperature expressed on the Celsius scale over a period of an average calendar year (365.25 days). | 2017-12-08 |
| UCSS | Degrees Celsius squared per second | Unavailable | 2006-05-04 |
| DCWK | Degrees Celsius weeks | Temperature multiplied by time. Used to express temperature accumulation over the duration of a week, also known as Degree Heating Weeks. | 2021-06-09 |
| DEGF | Degrees Fahrenheit | Unit of object hotness based upon a scale having 32 as the freezing point of water and 212 as the boiling point of water. | 2014-02-04 |
| DKPM | Degrees Kelvin per metre DEPRECATED | A rate of change of one unit on the Kelvin temperature scale per unit length of one metre. | 2020-09-08 |
| UABB | Degrees True | Unavailable | 2005-11-04 |
| DEGE | Degrees east | Unavailable | 2009-06-17 |
| DEGN | Degrees north | Unavailable | 2009-06-17 |
| DGPM | Degrees per metre | A change of angle in one SI unit of length. | 2020-09-04 |
| DGPS | Degrees per second | Unavailable | 2009-06-11 |
| UUUU | Dimensionless | A quantity with the dimension of 1. | 2017-10-22 |
| EVLT | Electronvolts | The amount of energy gained or lost by the charge of a single electron moving across an electric potential difference of one volt. One electronvolt equal to 1.602*10−19 joules. | 2018-01-18 |
| EQPL | Equivalents per litre | The amount of substance or substances in a litre of solution that will react with one gram of hydrogen. | 2015-12-10 |
| FMTG | Femtograms | 10^-15 grams or one 10^-18 of the SI standard unit of mass (kilogram). | 2023-03-17 |
| FGKG | Femtograms per kilogram | One part per 10^18 by weight of the measurand in the matrix. | 2022-12-02 |
| FGPL | Femtograms per litre | One 10^18 part of the SI standard unit of mass of the measurand per litre volume of matrix.. | 2022-12-02 |
| FMKG | Femtomoles per kilogram | A 10^18 part quantity of substance of the measurand per kilogram mass of matrix. | 2022-12-02 |
| UPFM | Femtomoles per litre | A 10^18 part quantity of substance of the measurand per litre volume of matrix. | 2022-12-02 |
| UFFU | Fluorescein Fluorescence Units | Dimensionless scale derived in the laboratory using fluorescein as a proxy for environmental pigments. | 2014-02-04 |
| UFNU | Formazin Nephelometric Units | Standardised scale for nephelometric measurement of turbidity calibrated against formazine solutions of different concentration and measured using an 860 nm light (near IR) with a 90 degree detection angle (ISO7027 compliant). | 2018-04-13 |
| UGRM | Grams | One thousandth part of the SI base unit of mass (kilogram). | 2014-02-04 |
| UGCC | Grams per cubic centimetre | Unavailable | 2003-11-05 |
| UGMC | Grams per cubic metre | Unavailable | 2003-11-05 |
| GPRG | Grams per gram | One part by weight of the measurand in the matrix. | 2015-06-01 |
| GPHT | Grams per hectare | 10^-3 of the SI unit of mass (kilogram) per 10^4 (10 thousand) of the SI unit of area (square metre). | 2022-12-02 |
| UGKG | Grams per kilogram | One part per 10^3 (thousand) by weight of the measurand in the matrix. | 2022-12-02 |
| GPRL | Grams per litre | A unit of mass concentration equal to 10^-3 of the SI unit of mass (kilogram) per 10^3 the SI unit of volume (cubic metre). | 2022-12-02 |
| GCM2 | Grams per square centimetre | A non-SI unit of pressure (sometimes referred to as gram-force per centimetre square) equivalent to 98.0665 Pascals. | 2019-05-20 |
| GQCY | Grams per square centimetre per year | A rate of change of 0.001 of the SI unit of mass over 0.00001 of the SI unit of area in a period of an average calendar year (365.25 days) | 2015-06-10 |
| GPKM | Grams per square kilometre | 10^-3 of the SI unit of mass (kilogram) per 10^3 of the SI unit of area (square metre). | 2022-12-02 |
| UGMS | Grams per square metre | Unavailable | 2003-11-05 |
| GSMD | Grams per square metre per day | 10^-3 of the SI unit of mass (kilogram) per SI unit of area in an elapsed time of one day (86400 seconds). | 2022-12-02 |
| UYAD | Gregorian calendar years anno Domini | A calendar year after the origin of the Gregorian calendar. | 2014-02-04 |
| UYBC | Gregorian calendar years before Christ | A calendar year prior to the origin of the Gregorian calendar expressed as a incrementing integer going back into the past. | 2014-02-04 |
| UYMD | Gregorian date (yyyymmdd) | A date according to the Gregorian Calendar expressed as an 8-byte string with the year in bytes 1-4, month within year in bytes 5-6 and day within month in bytes 7-8. | 2010-09-30 |
| HCTR | Hectares | A non-SI unit of area equal to a square with 100-metre sides or 10,000 square metres. | 2020-05-05 |
| HPAX | Hectopascals | A pressure of one hundred Newtons per square metre (100 Pascals). Equivalent to a millibar. | 2014-05-27 |
| HPAH | Hectopascals per hour | A change in pressure of one hundred Newtons per square metre (100 Pascals) per hour. Equivalent to a change of one millibar per hour. | 2011-01-26 |
| UTHZ | Hertz | Unavailable | 1996-02-28 |
| UHOR | Hours | A time interval of sixty minutes or 3600 seconds. | 2010-09-16 |
| UHMS | Hours Minutes Seconds | Unavailable | 1997-12-02 |
| TISO | ISO8601 | String corresponding to any legal ISO8601 format mask. This is the concatenation of 'yyyy-mm-dd' with any part of 'Thh:mm:ss.sss' (including none) depending on precision and an optional time zone indicator 'Zxxx' where xxx is the offset from UT. | 2014-02-04 |
| JOUL | Joule | A derived unit of energy in the International System of Units. It is equal to the energy transferred (or work done) when applying a force of one newton through a distance of one metre (1 newton metre or Nm), or in passing an electric current of one ampere through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818-1889). | 2017-08-10 |
| JPKG | Joules per kilogram | Unavailable | 2009-06-11 |
| JKGK | Joules per kilogram per Kelvin | Unavailable | 2009-06-11 |
| JCMH | Joules per square centimetre per day | Radiant energy per 10^-4 SI unit area over a period of one day. | 2015-01-28 |
| JMSQ | Joules per square metre | Unavailable | 2009-06-11 |
| KPAS | Kelvin Pascals per second | Unavailable | 2009-06-11 |
| KMTX | Kelvin metres | Unavailable | 2009-06-11 |
| KMTS | Kelvin metres per second | Unavailable | 2009-06-11 |
| KPRS | Kelvin per second | Unavailable | 2009-06-11 |
| KSXX | Kelvin second | Unavailable | 2009-06-11 |
| KMSS | Kelvin square metres per kilogram per second | Unavailable | 2009-06-11 |
| KLSQ | Kelvin squared | Unavailable | 2009-06-11 |
| UPKA | Kelvins | The base unit of temperature in the International System of Units. | 2020-09-08 |
| KPMT | Kelvins per metre | A change of temperature on the Kelvin temperature scale in one SI unit of length. | 2020-09-08 |
| KGPS | Kilogram per second | Unavailable | 2009-06-11 |
| KGXX | Kilograms | The SI standard unit of mass. | 2017-07-26 |
| UKMC | Kilograms per cubic metre | Unavailable | 2003-11-05 |
| KGVM | Kilograms per cubic metre per metre | One SI standard unit of mass per SI standard unit of volume per SI standard unit of length. | 2025-06-03 |
| KSP3 | Kilograms per cubic metre per second | Unavailable | 2009-06-11 |
| KGPH | Kilograms per hour | Unavailable | 2017-03-17 |
| KGMH | Kilograms per metre per hour | One SI standard unit of mass over one SI standard unit of length over 3600 times one SI standard unit of time. | 2020-01-20 |
| KMPS | Kilograms per metre per second | Unavailable | 2009-06-11 |
| KGAK | Kilograms per square kilometre | One SI standard unit of mass over the square of one thousand standard unit of length. | 2019-02-10 |
| KMP2 | Kilograms per square metre | Unavailable | 2009-06-11 |
| KSP2 | Kilograms per square metre per second | Unavailable | 2009-06-11 |
| KGS2 | Kilograms squared per second squared | Unavailable | 2009-07-06 |
| ULKM | Kilometres | Unit of length which is one thousand metres. | 2019-05-20 |
| KMDY | Kilometres per day | A change in location of a distance of one thousand metres in an elapsed time of one day (86400 seconds). | 2014-02-04 |
| KMHR | Kilometres per hour | A change in location of a distance of one thousand metres in an elapsed time of one hour (3600 seconds). | 2020-11-25 |
| KIPA | Kilopascals | A force of one thousand Newtons per square metre. | 2014-02-04 |
| UYKA | Kiloyears before present | The length of time elapsed expressed as thousands of years between the event of interest and the year 1950 AD. | 2014-02-04 |
| UKNT | Knots (nautical miles per hour) | Unavailable | 2000-12-28 |
| ULIT | Litres | Unavailable | 1996-11-13 |
| ULKG | Litres per kilogram | Unavailable | 1997-02-07 |
| LPUM | Litres per micromole | The inverse of a molar concentration - the untits of per molarity. | 2014-06-24 |
| ULPM | Litres per minute | Unavailable | 2003-06-30 |
| USIS | Magnetic susceptibility SI units | Unavailable | 2010-12-07 |
| UCGS | Magnetic susceptibility cgs units | Unavailable | 1996-10-24 |
| UCGG | Magnetic susceptibility cgs units per gram | Unavailable | 1996-10-24 |
| MBYT | Megabytes | Unavailable | 2005-09-01 |
| ULAA | Metres | The base unit of length in the International System of Units. | 2019-05-20 |
| UVAA | Metres per second | Unavailable | 2003-11-05 |
| MPS2 | Metres per second squared | Unavailable | 2009-06-11 |
| MPYR | Metres per year | A rate of change of SI standard unit length over a period of an average calendar year (365.25 days). | 2017-02-28 |
| M4S1 | Metres to the power four per second | Unavailable | 2017-02-28 |
| UMEC | MicroEinsteins per cubic metre per second | Unavailable | 2003-11-05 |
| UECH | MicroEinsteins per square centimetre per hour | Energy of 10^-6 moles of photons per 10^-4 SI unit area over a period of one hour. | 2015-01-28 |
| UESC | MicroEinsteins per square centimetre per second | Energy of 10^-6 moles of photons per 10^-4 SI unit area over a period of one second. | 2019-02-05 |
| UMES | MicroEinsteins per square metre per second | Unavailable | 2003-11-05 |
| UEQL | MicroEquivalents per litre | The amount of substance or substances in a litre of solution that will react with one microgram of hydrogen. | 2012-12-18 |
| UGPM | MicroGals per metre | A rate of change of one millionth part of a unit of gravitational acceleration equal to one centimetre per second per second over a distance of one metre. | 2010-11-04 |
| USCM | MicroSiemens per centimetre | One part per 10^6 (million) of the SI derived unit of electrical conductivity divided by 10^2 parts of the SI base unit of length. | 2022-12-02 |
| UATM | Microatmospheres | Unavailable | 2005-04-12 |
| UWBQ | Microbecquerels per kilogram | One radioactive disintegration per hundred thousand seconds from an SI standard unit of mass of sample. | 2016-10-06 |
| UUBQ | Microbecquerels per litre | Unavailable | 2014-06-07 |
| UGUG | Micrograms | 10^-6 grams or one 10^-9 of the SI standard unit of mass (kilogram). | 2022-12-02 |
| XGCC | Micrograms per cubic centimetre | One part in 10^9 of the SI unit of mass in one part in 10^6 of the SI unit of volume. | 2015-01-08 |
| MCUG | Micrograms per cubic metre | Unavailable | 2010-04-12 |
| UGM3 | Micrograms per cubic metre per hour | Unavailable | 2008-02-20 |
| WXCC | Micrograms per five cubic centimetres | One part in 10^9 of the SI unit of mass in five parts in 10^6 of the SI unit of volume. | 2016-05-16 |
| UGGR | Micrograms per gram | One part per 10^6 (million) by weight of the measurand in the matrix. | 2022-12-02 |
| UUKG | Micrograms per kilogram | One part per 10^9 (billion) by weight of the measurand in the matrix. | 2022-12-02 |
| UGPL | Micrograms per litre | Unavailable | 2000-02-09 |
| MGLH | Micrograms per litre per hour | A rate of change of mass of a measurand equivalent to 10^-9 kilogram (the SI unit of mass) per litre volume of matrix over a period of 1 hour. | 2015-01-08 |
| UUGS | Micrograms per millilitre | One part in 10^9 of the SI unit of mass in one part in 10^6 of the SI unit of volume. | 2015-01-08 |
| UUDX | Micrograms per square metre per day | Unavailable | 2003-11-05 |
| UUML | Microlitres per litre | Unavailable | 2001-07-27 |
| UMIC | Micrometres (microns) | Unavailable | 1996-10-11 |
| CMUM | Micromoles per cubic metre | 2015-11-10 | |
| UDPM | Micromoles per disintegrations per minute | 10^-6 of the SI unit of quantity of matter (the mole) per disintegrations per minute. Used to express the ratio of POC to Thorium-234. | 2022-11-28 |
| KGUM | Micromoles per kilogram | Unavailable | 2004-06-17 |
| UPOX | Micromoles per litre | Unavailable | 2003-11-05 |
| UMMD | Micromoles per litre per day | Unavailable | 2003-11-05 |
| UMMH | Micromoles per litre per hour | Unavailable | 2003-11-05 |
| UMUB | Micromoles per micromole per day | A change of one part per 10^6 of the SI unit of quantity of matter per one part per 10^6 of the SI unit of quantity of matter the quantity of matter over a period of 86400 seconds. | 2023-03-02 |
| UMGM | Micromoles per milligram per minute | 10^-6 of the SI unit of quantity of matter (the mole) per milligram of a substance per minute. Used to express the activity of enzymes by giving the quantity of product formed by the enzyme (in micromoles), per mass of total protein (milligrams) in a given amount of time (minute). | 2022-11-28 |
| UMPM | Micromoles per mole | Unavailable | 2007-09-19 |
| UMSM | Micromoles per square metre | 10^-6 of the SI unit of quantity of matter (the mole) per SI unit area. | 2022-11-28 |
| UUUD | Micromoles per square metre per day | Unavailable | 2003-11-05 |
| UMFX | Micromoles per square metre per hour | Unavailable | 2003-11-05 |
| UM2S | Micromoles per square metre per second | One part per 10^6 (million) of the SI unit of quantity of matter (the mole) per SI unit area per SI unit of time. | 2022-12-02 |
| USEC | Microseconds | A time interval of one millionth of a second. | 2014-05-06 |
| UWCN | Microwatts per square centimetre per nanometre | The power (scaled by 10^-6) per SI unit of area (scaled by 10^-4) produced per SI unit of length (scaled by 10^-9). | 2024-07-29 |
| MEKG | MilliEquivalents per kilogram | The amount of substance or substances in a kilogram of solution that will react with one milligram of hydrogen. | 2013-02-05 |
| MEQL | MilliEquivalents per litre | The amount of substance or substances in a litre of solution that will react with one milligram of hydrogen. | 2012-12-18 |
| MGAL | MilliGals | One thousandth part of a unit of gravitational acceleration equal to one centimetre per second per second. | 2014-02-04 |
| MGPM | MilliGals per month | A rate of change of one millionth part of a unit of gravitational acceleration equal to one centimetre per second per second over a time duration of 30.4375 days or 2629800 seconds. | 2014-07-17 |
| MSCM | MilliSiemens per centimetre | One part per 10^3 (thousand) of the SI derived unit of electrical conductivity divided by 10^2 parts of the SI base unit of length. | 2022-12-02 |
| MSPM | MilliSiemens per metre | One part per 10^3 (thousand) of the SI derived unit of electrical conductivity divided by the SI base unit of length. | 2022-12-02 |
| UMAM | Milliamps | Unavailable | 1998-07-13 |
| UPBB | Millibars | Unavailable | 2003-11-05 |
| MBQM | Millibecquerels per cubic metre | One radioactive disintegration per thousand seconds from an SI standard unit of volume. Equivalent microbecquerels per litre. | 2020-09-25 |
| MBPG | Millibecquerels per gram | One radioactive disintegration per thousand seconds per 1000th SI unit of sample mass. | 2018-05-03 |
| MBQK | Millibecquerels per kilogram | One radioactive disintegration per thousand seconds from an SI standard unit of mass of sample. | 2014-06-07 |
| UMBQ | Millibecquerels per litre | One radioactive disintegration per second from the SI unit of volume (cubic metre). Equivalent to Becquerels per cubic metre. | 2014-06-07 |
| MBQF | Millibecquerels per square metre per day | One radioactive disintegration per thousand seconds in material passing through an area of one square metre during a period of one day (86400 seconds). | 2019-01-20 |
| MGRM | Milligrams | 10^-6 of the SI unit of mass (kilogram) or 10^-3 grams. | 2020-11-03 |
| UCLC | Milligrams of carbon per (microEinstein per square metre per second) per milligram of chlorophyll per hour | Unavailable | 2005-03-01 |
| UCCL | Milligrams of carbon per milligram of chlorophyll per hour | Unavailable | 2007-03-05 |
| UMMC | Milligrams per cubic metre | Unavailable | 2003-11-05 |
| UGDC | Milligrams per cubic metre per day | Unavailable | 2003-11-05 |
| UGLH | Milligrams per cubic metre per hour | Unavailable | 2003-11-05 |
| MGCS | Milligrams per cubic metre per second | 10^-6 of the SI unit of mass (kilogram) per SI unit of volume per SI unit of time. | 2021-04-11 |
| MGPG | Milligrams per gram | One part per 10^3 (thousand) by weight of the measurand in the matrix. | 2022-12-02 |
| UMKG | Milligrams per kilogram | 10^-6 of the SI unit of mass (kilogram) per the SI unit of mass (kilogram). | 2024-08-22 |
| UMGL | Milligrams per litre | Unavailable | 1994-09-23 |
| MGMH | Milligrams per milligram per hour | 10^-6 of the SI unit of mass (kilogram) per 10^-6 of the SI unit of mass over 3600 times one SI standard unit of time. | 2025-07-15 |
| MGPF | Milligrams per milligram per hour per (micromole per square metre per second) | 10^-6 of the SI unit of mass (kilogram) per 10^-6 of the SI unit of mass over 3600 times one SI standard unit of time per (one part per 10^6 of the SI unit of quantity of matter (the mole) per SI unit area per SI unit of time). The units in brackets are units for photosynthetic photon flux density (PPFD). | 2025-07-15 |
| UMMS | Milligrams per square metre | Unavailable | 1999-03-09 |
| UGDX | Milligrams per square metre per day | Unavailable | 2003-11-05 |
| MGSQ | Milligrams per square metre per hour | Unavailable | 2005-05-05 |
| UM2D | Milligrams per square metre per incubation duration | Unavailable | 2003-11-05 |
| MGSS | Milligrams per square metre per second | 10^-6 of the SI unit of mass (kilogram) per SI unit of area per SI unit of time. | 2021-04-11 |
| VVML | Millilitres | Unit of volume which is equal to one 10^-3 litre or 10^-6 cubic metre. | 2015-01-08 |
| UMCH | Millilitres cleared per individual per hour | Unavailable | 2003-11-05 |
| MPM3 | Millilitres per cubic metre | Unavailable | 2009-09-16 |
| MIKG | Millilitres per kilogram | SI unit of volume scaled by 10^-6 per SI unit of mass. | 2022-12-02 |
| UMLL | Millilitres per litre | Unavailable | 2008-02-20 |
| CCPM | Millilitres per minute | Unavailable | 2007-09-19 |
| MSMD | Millilitres per square metre per day | Unavailable | 2009-03-16 |
| UXMM | Millimetres | Unit of length which is one thousandth of a metre. | 2019-05-20 |
| MMPD | Millimetres per day | A change in location of a distance of one thousandth (0.001) of a metre in an elapsed time of one day (86400 seconds). | 2014-02-04 |
| MMPH | Millimetres per hour | Unavailable | 2008-02-20 |
| UMMM | Millimetres per minute | Unavailable | 2001-10-25 |
| UVCC | Millimetres per second | Unavailable | 2003-11-05 |
| MMPY | Millimetres per year | A rate of change in length of one thousandth (0.001) of a metre over a period of an average calendar year (365.25 days). | 2019-06-17 |
| MMCM | Millimoles per cubic metre | Unavailable. | 2015-12-10 |
| MCMD | Millimoles per cubic metre per day | Unavailable. | 2015-12-10 |
| MMVY | Millimoles per cubic metre per year | A rate of change of one part in 10^3 of the SI unit of quantity of matter per SI unit of volume in a period of an average calendar year (365.25 days). | 2025-04-03 |
| MMKG | Millimoles per kilogram | One part in 10^3 of the SI unit of quantity of matter per SI unit of mass. | 2022-12-02 |
| MMPL | Millimoles per litre | Unavailable | 2008-02-20 |
| MMOM | Millimoles per mole | Unavailable | 2007-09-19 |
| MMSM | Millimoles per square metre | Unavailable. | 2015-12-15 |
| UMDX | Millimoles per square metre per day | Unavailable | 2003-11-05 |
| MM2H | Millimoles per square metre per hour | 10^-3 of the SI unit of quantity of matter per SI unit area over 3600 times one SI standard unit of time. | 2025-08-11 |
| MAKG | Million atoms per kilogram | Unit based on one million atoms in a SI standard unit of mass. | 2019-01-20 |
| UYMA | Millions of years before present | The length of time elapsed expressed as millions of years between the event of interest and the year 1950 AD. | 2014-02-04 |
| MRAD | Millirads per hour | One thousandth part of an absorbed ionizing radiation dose equal to 100 ergs per gram of irradiated material received per hour. | 2014-02-04 |
| UMSC | Milliseconds | A time interval of one thousandth of a second. | 2014-05-06 |
| UUMV | Millivolts | Unavailable | 1999-01-28 |
| MWSR | Milliwatts per square centimetre per micrometre per steradian | Unavailable | 2017-02-28 |
| MWNM | Milliwatts per square metre per nanometre | Unavailable | 2014-08-14 |
| MWNS | Milliwatts per square metre per nanometre per steradian | Unavailable | 2014-08-14 |
| UMIN | Minutes | A time interval of sixty seconds. | 2014-02-04 |
| MOLE | Moles | Unavailable | 2009-06-11 |
| UMPE | Moles per Einstein | Unavailable | 1999-03-18 |
| MLM3 | Moles per cubic metre | SI unit of quantity of matter per SI unit volume. | 2014-02-04 |
| MM3S | Moles per cubic metre per second | SI unit of quantity of matter per SI unit volume per SI unit of time. | 2014-02-04 |
| MPGH | Moles per gram per hour | SI unit of the quantity of matter per SI unit of mass per unit of time expressed in hour. | 2016-10-26 |
| MLKG | Moles per kilogram | Unavailable | 2009-06-11 |
| MPLT | Moles per litre | Unavailable | 2015-11-26 |
| MPMX | Moles per mole | Unavailable. | 2016-10-26 |
| MLPS | Moles per second | Unavailable | 2009-06-11 |
| MLM2 | Moles per square metre | SI unit of quantity of matter per SI unit area. | 2014-02-04 |
| MMSD | Moles per square metre per day | SI standard unit of amount of substance per SI unit area in an elapsed time of one day (86400 seconds). | 2021-04-11 |
| M2MS | Moles per square metre per second | SI unit of quantity of matter per SI unit area per SI unit of time. | 2014-02-04 |
| M2MM | Moles per square metre per second per metre | Unavailable | 2009-06-11 |
| M2SR | Moles per square metre per second per metre per steradian | Unavailable | 2009-06-11 |
| M3SR | Moles per square metre per second per steradian | Unavailable | 2009-06-11 |
| UMNT | Months | A time interval of 30.4375 days or 2629800 seconds. | 2014-05-06 |
| NAMP | Nanoamperes | An SI unit of electrical current equal to 10^−9 amperes. | 2020-04-07 |
| UNBQ | Nanobecquerels per litre | Unavailable | 2014-06-07 |
| UNPI | Nanograms | 10^-9 grams or one 10^-12 of the SI standard unit of mass (kilogram). | 2022-12-02 |
| UNID | Nanograms per day | Unavailable | 2008-02-20 |
| NGPG | Nanograms per gram | One part per 10^9 (billion) by weight of the measurand in the matrix. | 2022-12-02 |
| UNIM | Nanograms per individual per minute | Unavailable | 2000-12-12 |
| NGKG | Nanograms per kilogram | One part per 10^12 (trillion) by weight of the measurand in the matrix. | 2022-12-02 |
| UNGL | Nanograms per litre | Unavailable | 1994-12-19 |
| UNUL | Nanograms per microlitre | Unavailable | 2014-11-06 |
| NGML | Nanograms per millilitre | A unit of mass concentration equal to 10^-12 of the SI unit of mass (kilogram) in one part in 10^6 of the SI unit of volume (cubic metre). | 2022-12-02 |
| UXNM | Nanometres | Unit of length which is one billionth (10^-9) of a metre. | 2019-05-20 |
| NMCH | Nanomoles per cubic centimetre per hour | Unavailable | 2015-11-26 |
| KGNM | Nanomoles per kilogram | Unavailable | 2004-06-17 |
| UPNM | Nanomoles per litre | Unavailable | 2003-11-05 |
| UNMD | Nanomoles per litre per day | Unavailable | 2003-11-05 |
| UNMH | Nanomoles per litre per hour | Unavailable | 2003-11-05 |
| NMGH | Nanomoles per microgram per hour | Unavailable | 2005-08-02 |
| NMMM | Nanomoles per micromole | Unavailable. | 2015-12-10 |
| NMMD | Nanomoles per micromole per day | Unavailable. | 2015-12-10 |
| NPMM | Nanomoles per milligram per minute | 10^-9 of the SI unit of quantity of matter (the mole) per milligram of a substance per minute. Used to express the activity of enzymes by giving the quantity of product formed by the enzyme (in nanomoles), per mass of total protein (milligrams) in a given amount of time (minute). | 2023-10-11 |
| NMPM | Nanomoles per mole | Molar fraction of 10^-9 of the SI unit of quantity of matter (the mole) per SI unit quantity of matter. A concentration unit used to express the number of molecules of a particular substance in a mixture (in nanomoles) divided by the total number of moles in the given mixture. | 2023-10-11 |
| NSQD | Nanomoles per square metre per day | Unavailable | 2006-07-11 |
| UMAA | Nanoteslas | Unavailable | 2003-11-05 |
| NTML | Nautical miles | A unit of length used to measure distance at sea, equivalent to 1852 standard SI units of length (metres). | 2021-06-08 |
| USTU | Nephelometric Turbidity Units | Standardised scale for nephelometric measurement of turbidity calibrated against formazine solutions of different concentration and measured using a white light source at a 90 degree detection angle. Earlier measurements of turbidity tended to use NTU (sometimes also labelled STU or FTU) as the unit regardless of the measurement method. | 2018-04-16 |
| NCUM | Newtons per cubic metre | Unavailable | 2009-06-11 |
| NTPM | Newtons per metre | Derived SI unit for expressing surface tension. | 2018-07-03 |
| UNSM | Newtons per square metre | Unavailable | 2003-11-05 |
| XXXX | Not applicable | The property is a nominal property to which the concept of unit does not apply. | 2018-07-05 |
| UKWN | Not known | A unit of measure exists, but it is not known. | 2010-09-16 |
| USPC | Not specified | The units are deliberately undefined such as arbitrary units. | 2017-10-15 |
| NBHG | Number per 100 grams | Count of an entity or phenomenon occurrence in one 10th of the SI unit of mass (kilogram). | 2019-01-20 |
| NBTM | Number per 100 millilitres | Count of an entity or phenomenon occurrence in one part in 10^6 of the SI unit of volume (cubic metre). | 2023-06-28 |
| NCM3 | Number per cubic centimetre | Quantification of occurrence of an observed phenomenon in one part in 10^6 of the SI unit of volume. Equivalent to number per millilitre. | 2018-02-15 |
| UPMM | Number per cubic metre | Unavailable | 2008-02-20 |
| UNPG | Number per gram | Unavailable | 2003-11-05 |
| NHTR | Number per hectare | Count of an entity or phenomenon's occurrence in 10,000 times the SI unit area (square metre). | 2020-05-05 |
| NOPH | Number per hour | Unavailable. | 2017-03-10 |
| UNAH | Number per individual per hour | Unavailable | 2000-02-10 |
| UCPL | Number per litre | Unavailable | 2003-11-05 |
| NOPM | Number per metre | Unavailable. | 2017-03-10 |
| UCUL | Number per microlitre | Unavailable | 2008-02-20 |
| NBMG | Number per milligram | Count of an entity or phenomenon occurrence in one millionth of the SI unit of mass (kilogram). | 2019-01-20 |
| UCML | Number per millilitre | Unavailable | 2003-11-05 |
| UCNL | Number per nanolitre | Unavailable | 2008-03-04 |
| UVAY | Number per square centimetre per thousand years | Unavailable | 2005-02-28 |
| NPKM | Number per square kilometre | Unavailable | 2010-07-20 |
| UPMS | Number per square metre | Unavailable | 2003-11-05 |
| UNDX | Number per square metre per day | Unavailable | 2003-11-05 |
| OHMM | Ohm metres | Electrical resistance expressed in Ohms of a one metre length of conductor. Ohm is the SI unit of electrical resistance defined as the electrical resistance offered by a current-carrying element that produces a voltage drop of one volt when a current of one ampere is flowing through it. | 2010-11-04 |
| UOHM | Ohms | SI unit of electrical resistance defined as the electrical resistance offered by a current-carrying element that produces a voltage drop of one volt when a current of one ampere is flowing through it. | 2010-09-16 |
| UPPB | Parts per billion | Proportion of one part in 10^9 by weight, number, volume or amount (i.e. moles). | 2022-12-02 |
| UBLV | Parts per billion by volume | Unavailable | 1997-12-15 |
| UPPM | Parts per million | Proportion of one part in 10^6 by weight, volume or amount (i.e. moles). Milligrams/kilogram is a more explicit alternative for part per million by weight. | 2022-12-02 |
| UMLV | Parts per million by volume | Unavailable | 1997-12-15 |
| UPPE | Parts per ten thousand | Proportion of one part in 10^4 by weight, number, volume or amount (i.e. moles). | 2022-12-02 |
| UPPT | Parts per thousand | Proportion of one part in 10^3 by weight, number, volume or amount (i.e. moles). | 2022-12-02 |
| UPTH | Parts per thousand per hour | Unavailable | 2003-11-05 |
| PPTR | Parts per trillion | Proportion of one part in 10^12 by weight, volume or amount (i.e. moles or atoms). Nanograms per kilogram is a more explicit alternative for parts per trillion by weight. | 2022-12-02 |
| UTRV | Parts per trillion by volume | Unavailable | 1997-12-15 |
| PAMT | Pascal metres | Unavailable | 2010-10-11 |
| PAMS | Pascal metres per second | Unavailable | 2009-06-11 |
| PAM2 | Pascal metres per second squared | Unavailable | 2009-06-11 |
| PASS | Pascal seconds | Unavailable | 2009-06-11 |
| PPS2 | Pascal squared per second squared | Unavailable | 2009-06-11 |
| PASX | Pascals | The derived unit of pressure or stress in the international System of Units (SI). It is defined as one newton per square metre. | 2019-05-20 |
| PAPM | Pascals per metre | Unavailable | 2009-07-06 |
| PAPS | Pascals per second | Unavailable | 2009-06-11 |
| UPCT | Percent | Unavailable | 2003-11-05 |
| UPCD | Percent per day | Unavailable | 2003-11-05 |
| UPCH | Percent per hour | Unavailable | 2003-11-05 |
| UPOP | Percent per metre | Unavailable | 2003-11-05 |
| UPCW | Percent per week | A rate of change in percent over a period of 7 days | 2017-10-25 |
| UPDS | Percentage of dry sediment DEPRECATED | Unavailable | 2014-08-15 |
| UPAM | Picoamps per micromole per litre | Unavailable | 2017-10-25 |
| UGPG | Picograms | 10^-12 grams or one 10^-15 of the SI standard unit of mass (kilogram). | 2022-12-02 |
| PGPG | Picograms per gram | One part per 10^12 (trillion) by weight of the measurand in the matrix. | 2022-12-02 |
| PGKG | Picograms per kilogram | One part per 10^15 by weight of the measurand in the matrix. | 2022-12-02 |
| PGPL | Picograms per litre | One 10^15 part of the SI standard unit of mass of the measurand per litre volume of matrix.. | 2022-12-02 |
| UPMA | Picomoles per cubic metre | Unavailable | 2004-06-25 |
| UPVT | Picomoles per cubic metre per second | Unavailable | 2003-11-05 |
| KGPM | Picomoles per kilogram | Unavailable | 2007-09-06 |
| UPML | Picomoles per litre | Unavailable | 2003-11-05 |
| PMLD | Picomoles per litre per day | A change in the quantity of matter of 10^-12 moles in the SI unit of volume scaled by 10^-3 over a period of 86400 seconds. | 2015-01-08 |
| UPMH | Picomoles per litre per hour | A change in the quantity of matter of 10^-12 moles in the SI unit of volume scaled by 10^-3 over a period of 3600 seconds. | 2015-01-08 |
| UPVW | Picomoles per metre per watt per second | Unavailable | 1997-01-22 |
| PMMM | Picomoles per milligram per minute | A change in the quantity of matter of 10^-12 moles in 10^-6 of the SI unit of mass over a period of 60 seconds. | 2022-12-02 |
| UPMD | Picomoles per square metre per day | Unavailable | 2006-07-07 |
| PWAV | Picowatts per square centimetre per litre | The power (scaled by 10^-12) per SI unit of area (scaled by 10^-4) produced per SI unit of volume (scaled by 10^-3). | 2015-01-08 |
| PIXY | Pixels | The smallest resolvable element of a digital image and a unit of measure in image analysis. | 2018-01-12 |
| PSUX | Practical salinity units | One PSU equals one gram (10^-3 of the SI unit of mass) of salt (Na+Cl-) per kilogram (SI standard unit of mass) of seawater. | 2024-09-12 |
| URAD | Radians | Unavailable | 2009-06-11 |
| RAPS | Radians per second | Unavailable. | 2015-12-10 |
| UTBB | Seconds | The duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom. | 2014-05-06 |
| SCPM | Seconds per metre | Unavailable | 2018-07-10 |
| UECA | Siemens per metre | The SI derived unit of electrical conductivity divided by the SI base unit of length. | 2021-08-09 |
| UMTC | Square Metres.Hertz squared | Unavailable | 2003-11-05 |
| SQCM | Square centimetres | A unit of area defined as a square of one centimetre long on each side. | 2017-10-22 |
| SQCC | Square centimetres per cubic centimetre | Unavailable. | 2015-12-10 |
| UCMS | Square centimetres per second | Unavailable | 2003-11-05 |
| SQKM | Square kilometres | Unavailable | 2010-07-20 |
| M2SX | Square metre seconds | Unavailable | 2009-06-11 |
| M2RD | Square metre seconds per radian | Unavailable | 2009-06-11 |
| UMSQ | Square metres | Unavailable | 2003-11-05 |
| UMHZ | Square metres per Hertz | Unavailable | 2003-11-05 |
| M2HD | Square metres per Hertz per degree | Unavailable | 2016-07-06 |
| SMPG | Square metres per gram | Unavailable | 2014-08-15 |
| UMSG | Square metres per gram of dry sediment DEPRECATED | Unavailable | 2014-08-15 |
| SQMS | Square metres per second | Unavailable | 2009-06-11 |
| SQM3 | Square metres per second cubed | The SI unit of area, defined as a square of one metre long on each side, per cubic SI unit of time (seconds). | 2021-06-08 |
| SQM2 | Square metres per second squared | Unavailable | 2009-06-11 |
| UMTN | Square metres per squared Hertz | Unavailable | 2016-07-06 |
| UMTB | Square metres.Hertz | Unavailable | 2003-11-05 |
| UMTE | Square metres.Hertz^4 | Unavailable | 2003-11-05 |
| UMTD | Square metres.cubic Hertz | Unavailable | 2003-11-05 |
| SQUM | Square micrometres | A unit of area defined as a square of one micrometre long on each side. It has a dimension of L2 where L is length. It can be converted to the corresponding standard SI unit area by multiplying its value by a factor of 10^-12. | 2020-09-18 |
| USUM | Square microns per millilitre | Unavailable | 2003-11-05 |
| MILM | Square millimetres | A unit of area defined as a square of one millimetre long on each side. It has a dimension of L2 where L is length. It can be converted to the corresponding standard SI unit area by multiplying its value by a factor of 10^-6. | 2020-12-15 |
| USTR | Steradians | The steradian is the SI unit of solid angle. It is used to describe two-dimensional angular spans in three-dimensional space, analogous to the way in which the radian describes angles in a plane. | 2023-09-04 |
| USVD | Sverdrup | One Sverdrup is a million cubic metres per second or a million cumecs. | 2014-02-04 |
| MTON | Tonnes | A non-SI unit of mass equivalent to 1000 SI unit of mass (kilogram). | 2019-07-23 |
| UUTU | Tritium units (10**18H/Tr) | Unavailable | 1998-12-14 |
| UVLT | Volts | Unavailable | 1994-12-22 |
| UVP5 | Volts multiplied by 100000 | Voltage expressed as volts scaled by multiplying by one hundred thousand. | 2016-01-13 |
| WSMM | Watt seconds per square metre | Unavailable | 2009-06-11 |
| WATT | Watts | The SI derived unit of power. | 2013-07-16 |
| UWCM | Watts per cubic metre | Unavailable | 2003-11-05 |
| WPKG | Watts per kilogram | Unavailable | 2011-11-25 |
| WAPM | Watts per metre | Unavailable | 2009-06-11 |
| WAPK | Watts per metre per Kelvin | Unavailable | 2009-06-11 |
| UFAA | Watts per square metre | Unavailable | 2003-11-05 |
| WMSW | Watts per square metre per inverse metre per steradian | The power per unit area of radiation of a given wavenumber illuminating a target at a given incident angle. | 2014-02-04 |
| WM2M | Watts per square metre per metre | Unavailable | 2009-06-11 |
| WM2S | Watts per square metre per metre per steradian | Unavailable | 2009-06-11 |
| UWNM | Watts per square metre per nanometre | Unavailable | 2003-11-05 |
| UWNS | Watts per square metre per nanometre per steradian | Unavailable | 1998-11-11 |
| WMSS | Watts per square metre per steradian | Unavailable | 2009-06-11 |
| UYRS | Years | A time interval of 365.25 days or 31557600 seconds. | 2014-02-04 |
| UYBP | Years before present | The length of time elapsed expressed as years between the event of interest and the year 1950 AD. | 2014-02-04 |
| UUPH | pH units | Unavailable | 1994-09-16 |
| PPPS | per Pascal per second | Unavailable | 2009-06-11 |
| UPCM | per centimetre | Unavailable | 2017-10-25 |
| PCUM | per cubic metre | Volume of a cube with sides of length 1 metre. | 2014-02-04 |
| M3PS | per cubic metre per second | Unavailable | 2009-06-11 |
| UPDY | per day | Unavailable | 2003-11-05 |
| UFPD | per female per day | Unavailable | 2003-11-05 |
| PG01 | per gram | Unavailable | 2015-11-27 |
| UPRM | per metre | Unavailable | 2003-11-05 |
| UMNX | per metre per nanometre | Unavailable | 1995-09-15 |
| UMNS | per metre per nanometre per steradian | Unavailable | 1995-09-15 |
| PMPS | per metre per second | Unavailable | 2009-06-11 |
| PMSR | per metre per steradian | Unavailable | 2009-06-11 |
| PUML | per micromole per litre | Units used to describe the sensitivity of detection of a spectrophotometer. | 2016-09-19 |
| PMSC | per millisecond | Unavailable | 2009-12-03 |
| PRSC | per second | Unavailable | 2009-06-11 |
| UPSS | per second squared | Unavailable | 2003-11-05 |
| PMSQ | per square metre | Unavailable | 2009-07-06 |
| M2S2 | per square metre per second | Unavailable | 2009-07-06 |
| PSTR | per steradian | Unavailable | 2010-03-12 |
| XXPY | per year | A rate of change over a period of an average calendar year (365.25 days). | 2017-12-08 |
| UPHI | phi units | Logarithm to the base 2 of a length, generally sediment grain diameter, in millimetres as devised by Krumbein (1936). | 2014-02-04 |
| THSC | thousandths of a second | One thousandth part of the time interval of a second. | 2014-02-04 |
| UDTM | yyyymmddhh24miss.dd | Unavailable | 1999-12-10 |
