Clostridium botulinum

[bŏch′ə-līnəm]
n.
  1. A bacterium that occurs widely in nature and is a cause of botulism; its six main types, A to F, are characterized by antigenically distinct but pharmacologically similar, very potent neurotoxins.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.