noun
- microscopic single-celled organisms that can cause disease or be beneficial to living things
Usage: plural form; singular is bacterium; scientific
Examples
- Wash your hands to remove harmful bacteria.
- Some bacteria help digest food in your stomach.
- The scientist studied bacteria under a microscope.
- Antibiotics can kill certain types of bacteria.
- Bacteria are found everywhere in the environment.
- Good bacteria in yogurt can improve your health.