bacteria
Word family adjectivebacterialnounbacterioidbacteriaverbbacterize
bac·te·ri·a /bækˈtɪəriə $ -ˈtɪr-/ ●○○ noun [plural] (singular bacterium /-riəm/) —bacterial adjectiveadj a bacterial infection 细菌感染
Origin bacteria (1800-1900) Modern Latin Greek bakterion “stick, rod”; because of their shape