/ Dictionary / Index A aluminum borate: Meaning and Definition of Find definitions for: alu'minum bo'rate Pronunciation: [key] — Chem. Chem. a white, granular, water-insoluble powder, 2AlO&multiplydot;BO&multiplydot;3HO, used chiefly in the manufacture of crown glass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aluminum ammonium sulfate aluminum borohydride Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language