/ Dictionary / Index C cooperite: Meaning and Definition of Find definitions for: coop•er•ite Pronunciation: (k'pu-rīt"), [key] — n. a mineral, sulfide and arsenide of platinum, occurring in igneous rocks in the form of steel-gray crystals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. coopered joint Cooper's hawk Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language