Look up bacteria in Wiktionary, the free dictionary.
Bacteria are a major group of prokaryotic living organisms.
Bacteria may also refer to:
- Bacteria (malware) or Rabbit Programs, a type of malicious software
- Bacteria, a fictional country in The Great Dictator
- Bacteria (Asterix character), the wife of Unhygienix in the Asterix comics
- Bacteriidae, a family of South American stick insects