/ Dictionary / Index P proustite: Meaning and Definition of Find definitions for: proust•ite Pronunciation: (pr'stīt), [key] — n. Mineral. a mineral, silver arsenic sulfide, AgAsS, occurring in scarlet crystals and masses: a minor ore of silver; ruby silver. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Proustian Prov Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language