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[n] an organism (especially a bacterium) that does not require air or free oxygen to live
being, obligate anaerobe, organism
adenovirus, aerobe, aerobic bacteria, amoeba, anaerobic bacteria, bacillus, bacteria, bacterium, bug, coccus, disease-producing microorganism, echovirus, enterovirus, filterable virus, fungus, germ, gram-negative bacteria, gram-positive bacteria, microbe,