/ Dictionary / Index A ammonium chloride: Meaning and Definition of Find definitions for: ammo'nium chlo'ride Pronunciation: [key] — Chem., Pharm. Chem.,Pharm. a white, crystalline, water-soluble powder, NHCl, which produces a cooling sensation on the tongue, used chiefly in the manufacture of dry cells, in electroplating, and in medicine as an expectorant. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ammonium carbonate ammonium chrome alum Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language