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silica Definition

sili·ca (sil′i kə)

noun

a glassy, very hard mineral, silicon dioxide, SiO, found in a variety of forms, as in quartz, opal, chalcedony, sand, or chert

Etymology: ModL < L silex, flint: see silex

silica Telecom Definition

See silicon dioxide.

silica Usage Examples

Converse of object

  • fuse: The process starts with a laser beam or electron beam writing a pattern on fused silica or silicon.
  • contain: Usually the ores are mixed into rocks which contain silica.
  • base: The Stove enamel is believed to be mixed with a silica based paste and is probably too thick.
  • use: Core fills were cast using Araldite 20/20 epoxy resin tinted and bulked using fumed silica and dry powder pigments.

Adjective modifier

  • mesoporous: The modification of mesoporous silicas with organic and organometallic complexes is now an area of intense international activity.
  • fumed: The fumed silica, however, is quite hard.
  • respirable: These methods were then applied to develop and test hypotheses about the impact on exposure patterns of respirable silica and dust.
  • colloidal: Aerogel is made by high temperature and pressure critical point drying of a gel composed of colloidal silica structural units filled with solvents.
  • anhydrous: The tablets also contain the following ingredients: anhydrous colloidal silica, maize starch, povidone, microcrystalline cellulose and magnesium stearate.
  • crystalline: The main categories of the disease are:- Chronic - affects workers who inhale small amounts of crystalline silica over 10 to 20 years.

Modifies a noun

  • gel: He also used silica gel crystals to absorb the moisture.
  • aerogel: More than 2.4 m 2 of silica aerogel capture cells have been flown todate.
  • abrasive: An inclined channel feeds the silica abrasive to the surface of the test wheel about 2 cm in front of the test-piece.
  • sand: There is no silica sand in the Medway area.
  • fume: Two of the four HSC mixtures contained silica fume.
  • dust: This will minimize the risk of carrying silica dust on your clothes.

Noun used with modifier

  • alkali: However, there are some concerns regarding the susceptibility of RCA to alkali silica reaction ( ASR ).
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  • %: Cement contains up to 5 % silica in the form of free silicon dioxide which causes lung scarring known as silicosis.
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