/ Dictionary / Index A ammonium acetate: Meaning and Definition of Find definitions for: ammo'nium ac'etate Pronunciation: [key] — Chem. Chem. a white, crystalline, deliquescent, water-soluble solid, NH(CHO), used chiefly in the manufacture of dyes and meat preservatives. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ammonium ammonium alum Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language