/ Dictionary / Index P perphenazine: Meaning and Definition of Find definitions for: per•phen•a•zine Pronunciation: (pur-fen'u-zēn", -zin), [key] — n. Pharm. a crystalline, water-insoluble powder, CHClNOS, used chiefly as a tranquilizer and in the treatment of intractable hiccoughs and nausea and vomiting. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: perphenazine (Thesaurus) perpetuity Perpignan Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language