"botulin" in the noun sense
1. botulin, botulinus toxin, botulismotoxin
potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism can be used as a bioweapon
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License