silica

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noun sil·i·ca \ˈsi-li-kə\

Definition of silica

  1. :  the dioxide of silicon SiO2 occurring in crystalline, amorphous, and impure forms (as in quartz, opal, and sand respectively)

Origin and Etymology of silica

New Latin, from Latin silic-, silex hard stone, flint


First Known Use: circa 1801


SILICA Defined for English Language Learners

silica

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noun sil·i·ca \ˈsi-li-kə\

Definition of silica for English Language Learners

  • : a chemical that contains silicon, that is found in sand and quartz, and that is used to make glass


Medical Dictionary

silica

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noun sil·i·ca \ˈsil-i-kə\

Medical Definition of silica

  1. :  the dioxide of silicon SiO2 that is used as an ingredient of simethicone and that occurs naturally in crystalline, amorphous, and impure forms (as in quartz, opal, and sand respectively)—called also silicon dioxide


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