bacteroides

noun

bac·​te·​roi·​des -ˈrȯid-(ˌ)ēz 

1

capitalized : a genus of gram-negative anaerobic bacteria that belong to the family Bacteroidaceae, that have rounded ends, produce no endospores and no pigment, and that occur usually in the normal intestinal flora

2

plural bacteroides : a bacterium of the genus Bacteroides or of a closely related genus