silica

Silica is silicon dioxide which is a hard mineral that looks like glass.

(noun)

An example of silica is a material found in quartz.

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See silica in Webster's New World College Dictionary

noun

a glassy, very hard mineral, silicon dioxide, SiO, found in a variety of forms, as in quartz, opal, chalcedony, sand, or chert

Origin: ModL < L silex, flint: see silex

See silica in American Heritage Dictionary 4

noun
A white or colorless crystalline compound, SiO2, occurring abundantly as quartz, sand, flint, agate, and many other minerals and used to manufacture a wide variety of materials, especially glass and concrete.

Origin:

Origin: New Latin

Origin: , from Latin silex, silic-, hard stone, flint

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