International System of Units
The International System of Units (abbreviated SI from the
French ) is the modern form of the
metric system. It is the world's most widely used
system of units, both in everyday
commerce and in
science.The older metric system included several groups of units. The SI was developed in 1960 from the old
metre-
kilogram-
second (mks) system, rather than the
centimetre-gram-second (cgs) system, which, in turn, had a few variants.The SI introduced several newly named units. The SI is not static — units are created and definitions are modified through international agreement among many nations as the technology of measurement progresses.
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Systeme International d'Unites
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"
(synonym) Systeme International, SI system, SI, International System of Units, International System
(hypernym) metric system
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