Silica



noun
1.
the dioxide form of silicon, SiO 2 , 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.
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

silica sil·i·ca (sĭl’ĭ-kə)
n.
A crystalline compound occurring abundantly as quartz, sand, and many other minerals and used to manufacture a variety of materials, especially glass and concrete.
silica
(sĭl’ĭ-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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  • Silica-gel

    noun, Chemistry. 1. a highly adsorbent gelatinous form of silica, used chiefly as a dehumidifying and dehydrating agent. noun 1. an amorphous form of silica capable of absorbing large quantities of water: used in drying gases and oils, as a carrier for catalysts and an anticaking agent for cosmetics

  • Silica-glass

    noun 1. glass made entirely from silica, having a very low rate of thermal expansion. silica glass noun 1. another name for quartz glass



  • Silicate

    noun 1. Mineralogy. any of the largest group of mineral compounds, as quartz, beryl, garnet, feldspar, mica, and various kinds of clay, consisting of SiO 2 or SiO 4 groupings and one or more metallic ions, with some forms containing hydrogen. Silicates constitute well over 90 percent of the rock-forming minerals of the earth’s crust. […]

  • Silicates

    noun 1. Mineralogy. any of the largest group of mineral compounds, as quartz, beryl, garnet, feldspar, mica, and various kinds of clay, consisting of SiO 2 or SiO 4 groupings and one or more metallic ions, with some forms containing hydrogen. Silicates constitute well over 90 percent of the rock-forming minerals of the earth’s crust. […]



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