/ Dictionary / Index A arsenic trichloride: Meaning and Definition of Find definitions for: ar'senic trichlo'ride Pronunciation: [key] — Chem. Chem. a colorless or yellow, oily, poisonous liquid, AsCl, used chiefly as an intermediate in the manufacture of organic arsenicals. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arsenic disulfide arsenic trioxide Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language