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 Definitions for Silica: The Collaborative International Dictionary of English v.0.48
:
Silica \Sil"i*ca\, n. [NL., from L. silex, silics, a flint.]
(Chem.)
Silicon dioxide, SiO?. It constitutes ordinary quartz (also
opal and tridymite), and is artifically prepared as a very
fine, white, tasteless, inodorous powder.
[1913 Webster]
WordNet (r) 2.0
:
silica
n : a white or colorless vitreous insoluble solid (SiO2);
various forms occur widely in the earth's crust as quartz
or cristobalite or tridymite or lechartelierite [syn: {silicon
oxide}, silicon dioxide]
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