noun
- Plural of bacteria; microscopic single-celled organisms that lack a nucleus, found in soil, water, air, and living organisms.
Usage: Note: 'bacteria' is already the plural form of 'bacterium' in standard English. 'Bacterias' is considered nonstandard or incorrect in formal usage.; informal; nonstandard
Examples
- Some bacterias can cause infections in humans.
- The scientist studied different bacterias under the microscope.
- Antibiotics are used to kill harmful bacterias.
- Various bacterias live in the human digestive system.
- The water sample contained several types of bacterias.