International System of Units

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Definition
  1. Proper noun:
    • International System of Units: A globally accepted, coherent system of measurement units based on seven defining constants. It is the modern form of the metric system and is used as the standard for scientific, technical, industrial, and commercial measurement worldwide.
Usage
  • The International System of Units provides a consistent framework for expressing measurements.
  • In scientific papers, all data must be reported using the International System of Units.
  • The abbreviation for the International System of Units is SI, from the French .
Examples
  • The meter and the kilogram are base units in the International System of Units.
  • Adopting the International System of Units simplifies international trade and scientific collaboration.
  • Many countries have passed laws making the International System of Units their official system of measurement.
Advanced Usage
  • "SI base units": Refers to the seven fundamental units of the system: the meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (temperature), mole (amount of substance), and candela (luminous intensity).
    • The ampere is one of the seven SI base units.
  • "SI derived units": Refers to units formed by combining the base units, such as the newton (force) or the joule (energy).
    • The pascal, a unit of pressure, is an SI derived unit.
Variants and Related Words
  • SI (abbreviation): The standard abbreviation for the International System of Units.
    • SI units are used in all fields of science.
  • Metric system: The decimal system of measurement of which the SI is the modern, internationally agreed version.
  • Système International d'Unités (French): The original French name for the system.
Synonyms
  • SI system
  • Modern metric system
Related Phrases
  • "To be in SI units": To be expressed according to the conventions of the International System of Units.
    • Please ensure all measurements in your report are in SI units.
Noun
  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)
    • Today the United States is the only country in the world not totally committed to the Systeme International d'Unites

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