/ Dictionary / Index A ammonium bifluoride: Meaning and Definition of Find definitions for: ammo'nium bifluor'ide Pronunciation: [key] — Chem. Chem. a white, crystalline, water-soluble, poisonous solid, NHHF, used chiefly for cleaning and sterilizing brewing and dairy equipment. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ammonium bicarbonate ammonium binoxalate Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language