Origin of mycobacterium
First Known Use: 1909
Medical Definition of mycobacterium
1 capitalized : a genus of nonmotile acid-fast aerobic bacteria of the family Mycobacteriaceae that are usually slender and difficult to stain and that include the causative agents of tuberculosis (M. tuberculosis) and leprosy (M. leprae) as well as numerous purely saprophytic forms
2plural my·co·bac·te·ria \-ē-ə\play : any bacterium of the genus Mycobacterium or a closely related genus
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