2 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
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.
From WordNet r 1.6 [wn]:
silica
n : a white or colorless vitreous insoluble solid; various forms
occur widely in the earth's crust as quartz or
cristobalite or tridymite or lechartelierite [syn: {silicon
oxide}, {silicon dioxide}]
more about silica
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