/ Dictionary / Index O orpiment: Meaning and Definition of Find definitions for: or•pi•ment Pronunciation: (ôr'pu-munt), [key] — n. a mineral, arsenic trisulfide, AsS, found usually in soft, yellow, foliated masses, used as a pigment. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: orpiment (Thesaurus) orphrey orpine Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language