Silica

n.

1.

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

Noun

1.

silica - 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 Synonyms: silicon dioxide, silicon oxide

chert, cristobalite, flint, lechartelierite, oxide, quartz, silex, silicon dioxide, silicon oxide, tridymite