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IEVref:112-01-08ID:
Language:enStatus: Standard
Term: base quantity
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Definition: quantity in a conventionally chosen subset of a given system of quantities, where no quantity within the subset can be expressed in terms of the others

NOTE 1 – The subset mentioned in the definition is termed the set of base quantities. The International System of Quantities (ISQ) is defined by a set of seven base quantities.

NOTE 2 – Base quantities are referred to as being mutually independent since a base quantity cannot be expressed as a product of powers of the other base quantities.

NOTE 3 – The quantity “number of entities” can be regarded as a base quantity in any system of quantities.


Publication date:2010-01
Source:ISO/IEC GUIDE 99:2007 1.4
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