/ Dictionary / Index L lithium oxide: Meaning and Definition of Find definitions for: lith'ium ox'ide Pronunciation: [key] — Chem. Chem. a white powder, LiO, with strong alkaline properties: used in ceramics and glass. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lithium hydroxide lithium stearate Related Content Daily Word Quiz: bungled Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language