Bacteria

/bakˈtɪəriə/

Meaning & Definition

noun
Plural form of bacterium; microscopic single-celled organisms that exist as independent (free-living) organisms or as parasites.
Bacteria are essential for nutrient cycling in ecosystems.
A group of microorganisms that can cause diseases in humans, animals, and plants.
Some bacteria are harmful, leading to infections such as strep throat.
Prokaryotic microorganisms that have a wide range of shapes and metabolic types, found in various environments.
Bacteria can be found in extreme environments, such as hot springs and deep-sea vents.

Etymology

From the New Latin 'bacterium', derived from the Greek 'baktērion,' meaning 'small staff.'

Common Phrases and Expressions

good bacteria:
Beneficial bacteria that help in digestion and other processes.
bad bacteria:
Harmful bacteria that can cause infections or diseases.
bacterial infection:
An infection caused by bacteria.

Related Words

Slang Meanings

Bugs
I can't eat that meat; it's full of bugs.
Germs
Wash your hands; those germs are everywhere!