GNU Collaborative International Dictionary of English

Found one definition

1.       
   Cannabin (?), n. (Chem.) A poisonous resin extracted from hemp (Cannabis sativa, variety Indica).  The euphoric and narcotic effects of hasheesh are due to this resin; the active ingredient is tetrahydrocannabinol, THC.  See Cannabis Indica, below.
   
   [1913 Webster +PJC]