- the branch of medical science that studies bacteria in relation to disease
- (bacteriologist) a biologist who studies bacteria
- Microbiology (from Greek μῑκρος, mīkros, "small"; βίος, bios, "life"; and -λογία, -logia) is the study of microorganisms, which are unicellular or cell-cluster microscopic organisms. This includes eukaryotes such as fungi and protists, and prokaryotes. ...
- (Gr. bakterion = small rod + logos = discourse): the science, which treats of bacteria.
- the branch of microbiology dealing with bacteria.
- The study of bacteria.