silica

[ sil-i-kuh ]

noun
  1. the dioxide form of silicon, SiO2, occurring especially as quartz sand, flint, and agate: used usually in the form of its prepared white powder chiefly in the manufacture of glass, water glass, ceramics, and abrasives.

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Origin of silica

1
1795–1805; <New Latin, derivative of Latin silexsilex
  • Also called silicon dioxide.

Words Nearby silica

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British Dictionary definitions for silica

silica

/ (ˈsɪlɪkə) /


noun
  1. the dioxide of silicon, occurring naturally as quartz, cristobalite, and tridymite. It is a refractory insoluble material used in the manufacture of glass, ceramics, and abrasives

  2. short for silica glass

Origin of silica

1
C19: New Latin, from Latin: silex

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for silica

silica

[ sĭlĭ-kə ]


  1. 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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