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.
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
short for silica glass
silica sil·i·ca (sĭl’ĭ-kə)
A crystalline compound occurring abundantly as quartz, sand, and many other minerals and used to manufacture a variety of materials, especially glass and concrete.
silicon dioxide n.
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.
noun, Chemistry. 1. any of a number of polymers containing alternate silicon and oxygen atoms, as (–Si–O–Si–O–) n, whose properties are determined by the organic groups attached to the silicon atoms, and that are fluid, resinous, rubbery, extremely stable in high temperatures, and water-repellent: used as adhesives, lubricants, and hydraulic oils and in electrical insulation, […]
noun 1. any of the synthetic rubbers made from silicone elastomers.
- Silicon fen
noun 1. an area of Cambridgeshire, esp around the city of Cambridge, in which industries associated with information technology are concentrated
- Silicon glen
noun 1. a collective term for the industries in Scotland associated with information technology, esp those concentrated in the central conurbation between Glasgow and Edinburgh