Dictionary
coes•ite
Pronunciation: (kō'sīt), [key]—
n. Mineral.
a rare form of silicon dioxide, a denser polymorph of quartz, originally synthesized from quartz at high temperatures and pressures: later discovered in nature. Cf.
stishovite.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.