/ Dictionary / Index B barium stearate: Meaning and Definition of Find definitions for: bar'ium ste'arate Pronunciation: [key] — Chem. Chem. a white, crystalline, water-insoluble solid, Ba(CHO), used chiefly as a waterproofing agent and as a lubricant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. barium peroxide barium sulfate Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language