Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun si_unit

1 sense of si unit

Sense 1
Systeme International d'Unites, Systeme International, SI system, SI, SI unit, International System of Units, International System -- (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)