Definition of International System of Units in English:

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International System of Units

noun

A system of physical units ( SI units) based on the metre, kilogram, second, ampere, kelvin, candela, and mole, together with a set of prefixes to indicate multiplication or division by a power of ten.
Example sentences
  • The modern international system of units includes the Gray, the Sievert, and the Becquerel (Bq); these replace the rad, rem, and Curie, respectively.

Origin

Translating French Système International d'Unités.

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