/ Dictionary / Index L lithium carbonate: Meaning and Definition of Find definitions for: lith'ium car'bonate Pronunciation: [key] — Chem. Chem. a colorless crystalline compound, LiCO, slightly soluble in water: used in ceramic and porcelain glazes, pharmaceuticals, and luminescent paints. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lithium aluminum hydride lithium chloride Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language