| Noun | 1. | botulismotoxin - potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon bioarm, biological weapon, bioweapon - any weapon usable in biological warfare; "they feared use of the smallpox virus as a bioweapon" bacterial toxin - any endotoxin or exotoxin formed in or elaborated by bacterial cells |