Meaning of SI in English

Table of contents
  1. Pronunciation
  2. Noun
    1. Etymology
    2. Definitions

  1. Pronunciation

    /ˌɛs ˈaɪ/

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  1. Noun

    SI

    Etymology

    early 18th century: from the initial letters of Sancte Iohannes, the closing words of a Latin hymn (see solmization)

    Definitions

    1. a complete metric system of units of measurement for scientists

    Examples

    • « 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 (can »
  2. 2. a tetravalent nonmetallic element

    Examples

    • « next to oxygen it is the most abundant element in the earth's crust »
    • « occurs in clay and feldspar and granite and quartz and sand »
    • « used as a semiconductor in transistors »
  3. 3. the syllable naming the seventh (subtonic) note of any musical scale in solmization

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