/ Dictionary / Index A arsenic disulfide: Meaning and Definition of Find definitions for: ar'senic disul'fide Pronunciation: (mon"u-sul'fīd). [key] — Chem. Chem. an orange-red, water-insoluble, poisonous powder, AsS, AsS, or AsS, used chiefly in the manufacture of fireworks. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arsenical arsenic trichloride 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