/ Dictionary / Index B barium hydroxide: Meaning and Definition of Find definitions for: bar'ium hydrox'ide Pronunciation: [key] — Chem. Chem. baryta (def. 2). Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. barium enema barium oxide Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language