Noun silicon has 1 sense
  1. silicon, Si, atomic number 14 - 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
    --1 is a kind of chemical element, element; semiconductor, semiconducting material
    --1 is a substance of
     silicone, silicone polymer; clay; feldspar, felspar; granite; quartz; sand
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