Dictionary
Base unit
A measurement unit adopted by convention for a base quantity — in the SI: second, metre, kilogram, ampere, kelvin, mole, candela. VIM (JCGM 200:2012…
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27 results for “Base unit”
Dictionary
International System of Units (SI)
The system of units based on the ISQ, with unit names, symbols, prefixes, and rules for their use, adopted by the CGPM. Since the…
Dictionary
Base quantity
…VIM (JCGM 200:2012) 1.4 Standards & Units
Dictionary
Unit equation
A mathematical relation between base and derived units — N = kg·m·s⁻². VIM (JCGM 200:2012) 1.23 Standards & Units
Dictionary
Coherent system of units
A system of units in which every derived unit is coherent — the SI as used with its base and coherent derived units. VIM (JCGM…
Dictionary
System of units
A set of base and derived units, with their multiples and submultiples, defined under given rules for a given system of quantities. VIM (JCGM…
Dictionary
Derived unit
A measurement unit for a derived quantity, formed as a product of powers of base units — the newton (kg·m·s⁻²) or the…
The US edition of the SI Brochure reflecting the 2019 redefinition in which all seven base units derive from fixed defining constants. Freely available…
Dictionary
Coherent derived unit
A derived unit that is a product of powers of base units with no numerical factor other than one — the newton is coherent in…
Dictionary
International System of Quantities (ISQ)
The system of quantities based on the seven base quantities: length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity — the…