/ Dictionary / Index L lithium fluoride: Meaning and Definition of Find definitions for: lith'ium fluor'ide Pronunciation: [key] — Chem. Chem. a fine, white, slightly water-soluble powder, LiF, used chiefly in the manufacture of ceramics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lithium chloride lithium hydroxide 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