International System of Units(redirected from S.I. system)
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International System of Unitsalso International System
A complete, coherent system of units used for scientific work, in which the fundamental quantities are length, time, electric current, temperature, luminous intensity, amount of substance, and mass. The International System of Units unit of length is the meter; the unit of time is the second.
Interna′tional Sys′tem of U′nits
an internationally accepted system of physical units, using the meter, kilogram, second, ampere, kelvin, mole, and candela as the basic units of length, mass, time, electric current, temperature, amount of substance, and luminous intensity. Abbr.: SI
[translation of the earlier French name Système Internationale d'Unités]
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|Noun||1.||International System of Units - 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"|
metric system - a decimal system of weights and measures based on the meter and the kilogram and the second