Source : Webster's Revised Unabridged Dictionary (1913)

Piperine \Pip"er*ine\, n. [L. piper pepper: cf. F. piperin,
   piperine.] (Chem.)
   A white crystalline compound of piperidine and piperic acid.
   It is obtained from the black pepper ({Piper nigrum}) and
   other species.

Source : WordNet®

piperine
     n : derived from pepper (especially black pepper); source of the
         hotness of black and white pepper [syn: {piperin}]