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Definitions

bacteria

[bak-teer-ee-uh] / bækˈtɪər i ə /
NOUN
microorganisms
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Scientists used germ-free mouse models, which are raised in completely sterile conditions without any bacteria.

From Science Daily • Apr. 9, 2026

While antibiotic-resistant cholera is not currently widespread, bacteria can adapt quickly, and treatments may become less effective over time.

From Science Daily • Apr. 7, 2026

Hsiao plans to explore how these dietary changes influence the human gut microbiome and whether they could also help defend against other infectious bacteria.

From Science Daily • Apr. 7, 2026

They interfere with a tiny, syringe-like structure on the surface of cholera bacteria that is used to inject toxins into nearby cells.

From Science Daily • Apr. 7, 2026

“I know that’s a real lot of bacteria in one hot sweaty room,” I tell Guillermo.

From "I'll Give You the Sun" by Jandy Nelson