Definition of Silica

1. Noun. A white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite.

Exact synonyms: Silicon Dioxide, Silicon Oxide
Substance meronyms: Cristobalite, Quartz, Crystal, Lechatelierite, Quartz, Quartz Glass, Vitreous Silica, Tridymite
Specialized synonyms: Chert, Flint, Silex
Generic synonyms: Oxide
Derivative terms: Siliceous, Silicious

Definition of Silica

1. n. Silicon dioxide, SiO&?;. It constitutes ordinary quartz (also opal and tridymite), and is artifically prepared as a very fine, white, tasteless, inodorous powder.

Definition of Silica

1. Noun. Silicon dioxide. ¹

2. Noun. Any of the silica group of the silicate minerals. ¹

¹ Source:

Definition of Silica

1. a form of silicon [n -S]

Medical Definition of Silica

1. Fine particulate dust from quartz rock that is known to cause a progressive lung injury over long-term. See: pneumoconiosis. (27 Sep 1997)

Lexicographical Neighbors of Silica

silhouette sign of Felson
silica (current term)
silica dust
silica gel
silica granuloma
silica group
silicate cement
silicate planet
silicate planets
silicate restorations

Literary usage of Silica

Below you will find example usage of this term as found in modern and/or classical literature:

1. Journal of the American Chemical Society by American Chemical Society (1908)
"The fusion was treated with hydrochloric acid and evaporated twice to dryness and the silica determined as usual. (2) Double dehydration of ore in ..."

2. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General by Thomas Spencer Baynes (1888)
"65 silica, 33 alumina, 7 '6 potash, and 6 water; but in many localities ... Cc : silica 38, alumina 29 "4, protoxide of iron 2'9, peroxide of iron 4, ..."

3. Biennial report by North Dakota Geological Survey (1906)
"silica 46.3 per cent. Water 13.9 per cent. Some flint clays have a higher percentage of alumina than pure kaolin:te, and this fact leads to the belief that ..."

4. Standard methods of chemical analysis: A Manual of Analytical Methods and by Wilfred Welday Scott (1917)
"After diluting with an equal volume of water, filtration is proceeded with immediately, and the silica is washed with a hot solution consisting of 5 cc. ..."

5. First Principles of Chemistry by Benjamin Silliman (1859)
"No acid, except the hydrofluoric, has any effect on silica. ... When silica is fused in 4 or 6 times its weight of carbonate of soda or potassa, ..."

6. The Principles of Chemistry by Dmitry Ivanovich Mendeleyev (1891)
"Berzelius determined the presence of oxygen in silica—namely, that 8 parts of ... The composition of silica was first expressed as SiO (and for the sake of ..."

7. Pharmaceutical Journal by Pharmaceutical Society of Great Britain (1857)
"The earth which remains undissolved after this treatment is silica. Now coffee, we find, is remarkably distinguished from the roots and cereals, ..."

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