/ Dictionary / Index L lithium hydroxide: Meaning and Definition of Find definitions for: lith'ium hydrox'ide Pronunciation: [key] — Chem. Chem. a white, crystalline, water-soluble compound, LiOH, used to absorb carbon dioxide, esp. in spacesuits. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lithium fluoride lithium oxide Related Content Daily Word Quiz: verdant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language