Clostridium Botulinum definition
Definition of BOTULINUM. : a spore-forming bacterium (Clostridium botulinum) that secretes botulinum toxin.â botÂ·uÂ·liÂ·nal \-ËlÄ«-nÉl\ adjective. a spore-forming bacterium (Clostridium botulinum) that secretes botulinum toxin.