Bacillus subtilis

Bacillus subtilis is a Gram-positive, catalase-positive bacterium commonly found in soil. A member of the genus Bacillus, B. subtilis has the ability to form a tough, protective endospore, allowing the organism to tolerate extreme environmental conditions. Unlike several other well-known species, B. subtilis has historically been classified as an obligate aerobe, though recent research has demonstrated that this is not strictly correct.
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Bacillus /Ba·cil·lus/ a genus of bacteria, including gram-positive, spore-forming bacteria; three species are potentially pathogenic. [more]Bacillus subtilis - Community and Resources

Noun
1. a species of Bacillus found in soil and decomposing organic matter; some strains produce antibiotics
(synonym) Bacillus globigii, grass bacillus, hay bacillus
(hypernym) Bacillus, Bacilli, B

a microbe commonly found in soil and vegetation, normally considered nonpathogenic, sometimes used in recombinant microbial fermentation.