Noun: SI unit
- 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)
- Système International d'Unités, Système International, SI system, SI, International System of Units, International System
Derived forms: SI units
Type of: metric system
Encyclopedia: SI unit