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Vocabulary

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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
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