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Meaning & Definition of Si in English

English

Si

/si/

noun

1. 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
    synonym:
  • silicon
  • ,
  • Si
  • ,
  • atomic number 14

2. 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"
    synonym:
  • Systeme International d'Unites
  • ,
  • Systeme International
  • ,
  • SI system
  • ,
  • SI
  • ,
  • SI unit
  • ,
  • International System of Units
  • ,
  • International System

3. The syllable naming the seventh (subtonic) note of any musical scale in solmization

    synonym:
  • ti
  • ,
  • te
  • ,
  • si