Silica meaning

sĭlĭ-kə
A chemical compound that is the main constituent of most of the Earth's rocks. Silica occurs naturally in five crystalline forms (quartz, tridymite, cristobalite, coesite, and stishovite), in a cryptocrystalline form (chalcedony), and in an amorphous form (opal). It is also the main chemical compound in sand. Silica is used to make glass, concrete, and other materials. Also called silicon dioxide. Chemical formula: SiO2.
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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.
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Silica is silicon dioxide which is a hard mineral that looks like glass.

An example of silica is a material found in quartz.

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A glassy, very hard mineral, silicon dioxide, SiO2, found in a variety of forms, including quartz, opal, chalcedony, sand, or chert.
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Silicon dioxide.
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Any of the silica group of the silicate minerals.
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Other Word Forms

Noun

Singular:
silica
Plural:
silicas

Origin of silica

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

    From American Heritage Dictionary of the English Language, 5th Edition

  • Origin: 1585-95; in Latin silex (“hard stone, flint"). Subsequently, silicon was first identified by the chemist Antoine Lavoisier in 1787 as a component element of the silex, or silicis for flint, and more generally what were termed "flints" during the era, nowadays as we would say "silica" or more formally, silicate.

    From Wiktionary