Main Entry: In·ter·na·tion·al System of Units

Pronunciation: \ˌint-ər-ˈnash-nəl-, -ən^əl-\

Function: noun

: an internationally accepted system of units based on the metric system and having the meter, kilogram, second, ampere, kelvin, mole, and candela as base units, the radian and steradian as supplementary units, and deriving all other units from these—abbreviation SI; called also International System