eubacteria, eubacterium, true bacteria - a large group of bacteria having rigid cell walls; motile types have flagella

genus Clostridium - anaerobic or micro-aerophilic rod-shaped or spindle-shaped saprophytes; nearly cosmopolitan in soil, animal intestines, and dung

bioarm, biological weapon, bioweapon - any weapon usable in biological warfare; "they feared use of the smallpox virus as a bioweapon"