/ Dictionary / Index B bicarbonate: Meaning and Definition of Find definitions for: bi•car•bo•nate Pronunciation: (bī-kär'bu-nit, -nāt"), [key] — n. Chem. a salt of carbonic acid, containing the HCO group; an acid carbonate, as sodium bicarbonate, NaHCO. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bicarbonate (Thesaurus) bicarb bicarbonate of soda Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language