An obsolete generic name sometimes used for the anaerobic fusiform bacteria found in the human mouth; these organisms are closely related to the anaerobic organisms found in the human intestine and have been placed in the genus Fusobacterium. [see fusiform]
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Fu·si·for·mis .fyü-zə-'fȯrm-əs n in some classifications a genus of parasitic anaerobic or microaerophilic nonmotile bacteria of the family Bacteroidaceae now usu. included in the genus Fusobacterium
Medical dictionary. 2011.