/ Dictionary / Index A arsenopyrite: Meaning and Definition of Find definitions for: ar•se•no•py•rite Pronunciation: (är"su-nō-pī'rīt, är-sen"u-), [key] — n. a common mineral, iron arsenic sulfide, FeAsS, occurring in silver-white to steel-gray crystals or masses: an ore of arsenic. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arsenopyrite (Thesaurus) arsenolite arsenous 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