bacterium /bækˈtirijəm/ noun plural bacteria /-ˈtirijə/ /bækˈtirijə/ plural bacteria /-ˈtirijə/ /bækˈtirijə/ Learner's definition of BACTERIUM
[count]
: any one of a group of very small living things that often cause disease细菌 —
usually plural通常用复数 — bacterial
/bækˈtirijəl/ adjective