Pronunciation: (sil'i-ku), [key]
the dioxide form of silicon, SiO2, occurring esp. as quartz sand, flint, and agate: used usually in the form of its prepared white powder chiefly in the manufacture of glass, water glass, ceramics, and abrasives. Also called silicon dioxide.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.