The Collaborative International Dictionary of English v.0.48:

Menispermine \Men`i*sper"mine\, n. [Cf. F. m['e]nispermine.]
   (Chem.)
   An alkaloid distinct from picrotoxin and obtained from the
   cocculus indicus (the fruit of Anamirta Cocculus, formerly
   Menispermum Cocculus) as a white, crystalline, tasteless
   powder; -- called also menispermina.
   [1913 Webster]