QIMT Glossary

Definitions of Metrology terms & phrases.

If you know of a term or phrase that belongs here, you can submit the term or phrase and associated definition by adding an entry. NOTE: All entries are reviewed and approved prior to being seen by others on the site.

Procedure for adding a Definition:

  1. Click on the "Add a New Entry" button.
  2. Under the first required field labeled 'Concept', enter the Metrology word or term.
  3. In the 'Description' Field, put the definition, don't forget to use the "DeWord" button to remove MS Word formatting if you are copying and pasting from MS Word; see lounge forum for note regarding this issue.
  4. Ignore the other entries and submit.

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Co-operation between national metrological institutes in and the European Commission.


Fundamental Metrology


General conference on measures and weights



Good Laboratory Practice. Accrediting bodies approve laboratories in accordance with the GLP rules of OECD.


Guide to the Expression of Uncertainty in Measurement. Published by BIPM, IEC, ISO, OIML and IFCC (International Federation of Clinical Chemistry), IUPAC (International Union of Pure and Applied Chemistry) and IUPAP (International of Pure and Applied Physics).


History, measuring equipment

See calibration history.



International Electrotechnical Commission.


International Laboratory Accreditation Coorperation

Indication (of a measuring instrument)

Value of a (measurable) quantity provided by a measuring instrument.

Influence quantity

Quantity that is not the measurand (quantity subject to measurement) but that affects the result of the measurement.

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