/ Dictionary / Index P piperine: Meaning and Definition of Find definitions for: pip•er•ine Pronunciation: (pip'u-rēn", -ur-in), [key] — n. Chem. a white, crystalline alkaloid, CHNO, obtained from pepper and other piperaceous plants and also prepared synthetically: used as an insecticide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: piperine (Thesaurus) piperidine piperonal Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language