/ Dictionary / Index M mercuric chloride: Meaning and Definition of Find definitions for: mercu'ric chlo'ride Pronunciation: [key] a white, crystalline, water-soluble, strongly acrid, highly poisonous solid, HgCl, prepared by sublimation of chlorine with mercury, and used chiefly as an antiseptic. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mercuric mercuric oxide Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language