/ Dictionary / Index P pinite: Meaning and Definition of Find definitions for: pin•ite Pronunciation: (pin'īt, pē'nīt), [key] — n. a micaceous mineral, similar in composition to muscovite, formed by chemical alteration of various other minerals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pinite (Thesaurus) pinion pinitol Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language