Piperidine \Pi*per"i*dine\, n. (Chem.) An oily liquid alkaloid, C5H11N, having a hot, peppery, ammoniacal odor. It is related to pyridine, and is obtained by the decomposition of piperine. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Piperidine \Pi*per"i*dine\, n. (Chem.) An oily liquid alkaloid, C5H11N, having a hot, peppery, ammoniacal odor. It is related to pyridine, and is obtained by the decomposition of piperine.

Source: Webster's Revised Unabridged Dictionary (1913)