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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.

Birds that spent more time together had more similar gut bacteria, especially anaerobic microbes that can only survive in low-oxygen conditions.

From Science Daily • Apr. 13, 2026

These conditions can facilitate the spread of viruses, bacteria and parasites.

From Los Angeles Times • Apr. 13, 2026

In this process, harmful bacteria such as Porphyromonas gingivalis often regain dominance quickly because they thrive in inflamed gum tissue.

From Science Daily • Apr. 13, 2026

The Los Angeles County Public Health Department is warning beachgoers to avoid all contact with the water due to the potential of bacteria from street runoff from recent rains.

From Los Angeles Times • Apr. 13, 2026

Then, in the late 1890s, two Germans, Friedrich Löffler and Paul Frosch, discovered other disease-causing organisms even tinier than bacteria, called viruses.

From "An American Plague: The True and Terrifying Story of the Yellow Fever Epidemic of 1793" by Jim Murphy




Vocabulary lists containing bacteria