International System of Units
WordNet
noun
(1) A complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela)
"Today the United States is the only country in the world not totally committed to the Systeme International d'Unites"
WiktionaryText
Noun
International System of Units (abbreviated SI)
- The standard set of basic units of measurement, to be used in scientific literature worldwide.