Meaning & use
Silicon
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A hard, brittle, non-metallic chemical element (symbol Si) that is a fundamental semiconductor material used in electronics and is a major component of sand and rock.
See it in a sentence
Computer chips are manufactured from thin wafers of purified silicon.
Silicon is the second most abundant element in the Earth's crust after oxygen.
A note on using this word
"Silicon" is often confused with "silicone," a different, synthetic polymer material used in sealants and cosmetic implants.
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