SI, n.
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)
<noun.quantity>
International System International System of Units SI SI system SI unit Systeme International Systeme International d'Unites
sample sentences
"Today the United States is the only country in the world not totally committed to the Systeme International d'Unites"
semantic pointers
hypernym