Pronunciation: (sil'ān), [key]
1. Also called silicon tetrahydride. a gas with an unpleasant odor, SiH4, soluble in water: used as a doping agent for semiconductors in the production of solid-state devices.
2. any of a class of silicon hydrides analogous to the alkanes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.