International System of Units

International System of Units

noun

Definition of INTERNATIONAL SYSTEM OF UNITS

: a system of units based on the metric system and developed and refined by international convention especially for scientific work —abbreviation SI

First Known Use of INTERNATIONAL SYSTEM OF UNITS

1932

In·ter·na·tion·al System of Units

noun \ˌint-ər-ˈnash-nəl-, -ən^əl-\   (Medical Dictionary)

Medical Definition of INTERNATIONAL SYSTEM OF UNITS

: 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

International System of Units

noun    (Concise Encyclopedia)

International decimal system of weights and measures derived from and extending the metric system of units. Adopted by the 11th General Conference on Weights and Measures in 1960, it was developed to eliminate overlapping but different systems of units of measures fostered by rapid advances in science and technology in the 19th–20th centuries. Its fundamental units include the metre (m) for length, the kilogram (kg) for mass, and the second (sec) for time. Derived units include those for force (newton, N), energy (joule, J), and power (watt, W).

Variants of INTERNATIONAL SYSTEM OF UNITS

International System of Units or Système International d'Unités or SI system