Definition of si

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  • si is a valid Scrabble US word with a point value of 2
  • si is a valid Scrabble UK word with a point value of 2
  • si is a valid Words with friends word with a point value of 2

Definition of si

  • a tetravalent nonmetallic element; 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 (noun)

    Synonyms

    1. atomic number 14
    2. silicon
  • 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) (noun)

    Synonyms

    1. international system
    2. international system of units
    3. si system
    4. si unit
    5. systeme international
    6. systeme international d'unites
  • the syllable naming the seventh (subtonic) note of any musical scale in solmization (noun)

    Synonyms

    1. te
    2. ti

See definition of si in Merriam Webster