Silica Definition

sĭlĭ-kə
noun
A glassy, very hard mineral, silicon dioxide, SiO2, found in a variety of forms, including quartz, opal, chalcedony, sand, or chert.
Webster's New World
Silicon dioxide.
Wiktionary
Synonyms:

Other Word Forms of Silica

Noun

Singular:
silica
Plural:
silicas

Origin of Silica

  • 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

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

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

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