standard measurements of physical quantities that require a clear definition to be useful. The International Bureau of Weights and Measures (BIPM) is responsible for ensuring the standardization of the use of units of measurement in the measurement of weights and measures, as well as the definition and application of these in everyday life.

real scalar quantity (3.11), defined and adopted by convention, with which any other quantity of the
same kind can be compared to express the ratio of the second quantity to the first one as a number
[SOURCE: ISO 80000-1:2009, 3.9, modified — The preferred term has been changed from “unit of
measurement” to “unit”; Notes 1 to 5 to entry have been removed.]

BS EN ISO 23387:2020


ISO 12006-3 names

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