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Noun: SI unit
  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)
    - 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