/ Dictionary / Index P piperaceous: Meaning and Definition of Find definitions for: pip•er•a•ceous Pronunciation: (pip"u-rā'shus, pī"pu-), [key] — adj. belonging to the Piperacae, the pepper family of plants. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. piper piperacillin Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language