/ Dictionary / Index P phillipsite: Meaning and Definition of Find definitions for: phil•lips•ite Pronunciation: (fil'ip-sīt"), [key] — n. a zeolite mineral, similar to stilbite but with potassium replacing some of the calcium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: phillipsite (Thesaurus) Phillips head phillumenist Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language