Bacterium
bacillus Audio
ba·cil·lus [ buh-sil-uhs ]
Subclass of:
Bacillaceae
Etymology:
Latin diminutive of baculum = a rod
Definitions related to genus bacillus:
  • (bacillus) Any bacteria that is not assigned to the species level but can be assigned to the Bacillus genus level.
    CDISC Terminology
    Clinical Data Interchange Standards Consortium (CDISC), 2021
  • (bacillus) A genus of BACILLACEAE that are spore-forming, rod-shaped cells. Most species are saprophytic soil forms with only a few species being pathogenic.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • (bacillus) A genus of bacteria within the phylum Firmicutes consisting of gram-positive bacilli that are either obligate or facultative aerobes, and test positive for the enzyme catalase.
    NCI
    U.S. National Cancer Institute, 2021
  • (bacillus) Genus of bacillaceae that are spore forming, rod shaped cells; most species are saprophytic soil forms with only a few species being pathogenic.
    CRISP Thesaurus
    National Institutes of Health, 2006
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.