ˌ ̷ ̷ ̷ ̷ˈfȯrmə̇s noun
Usage: capitalized
Etymology: New Latin, from International Scientific Vocabulary fusiform
in some classifications : a genus of parasitic anaerobic or microaerophilic nonmotile bacteria (family Bacteroidaceae) that stain unevenly, form no spores, and are often associated with purulent lesions