/ Dictionary / Index P piperidine: Meaning and Definition of Find definitions for: pi•per•i•dine Pronunciation: (pi-per'i-dēn", -din, pī-, pip'ur-i-), [key] — n. Chem. a colorless, water-soluble liquid, CHN, obtained from the alkaloid piperine or from pyridine: used chiefly as a solvent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. piperazine piperine 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