/ Dictionary / Index P polianite: Meaning and Definition of Find definitions for: po•li•a•nite Pronunciation: (pō'lē-u-nīt"), [key] — n. Mineral. a variety of pyrolusite, MnO, having well-developed crystals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. poleyn police Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language