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Definitions of si
  1. noun
    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
  2. noun
    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)
    type of:
  3. noun
    the syllable naming the seventh (subtonic) note of any musical scale in solmization

    Similar: 

    te ti
    type of:
Definition that contains si
  • place sing a note with the correct pitch
  • big significant
  • sit sit and travel on the back of animal, usually while controlling its motions
  • set situated in a particular spot or position
  • rest sit, as on a branch
  • dear sincerely earnest
  • bed single thickness of usually some homogeneous substance
  • light silly or trivial
  • top situated at the top or highest position
  • ride sit on and control a vehicle
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