Bacillus anthracis

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Noun1.Bacillus anthracis - a species of bacillus that causes anthrax in humans and in animals (cattle and swine and sheep and rabbits and mice and guinea pigs)Bacillus anthracis - a species of bacillus that causes anthrax in humans and in animals (cattle and swine and sheep and rabbits and mice and guinea pigs); can be used a bioweapon
B, bacillus - aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil
bioarm, biological weapon, bioweapon - any weapon usable in biological warfare; "they feared use of the smallpox virus as a bioweapon"