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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.

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The fever is not harmful, but it can make babies feel crummy as their body is building up antibodies against viruses and bacteria.

From Los Angeles Times Jul. 28, 2026

Only male mosquitoes – infected with the naturally occurring bacteria Wolbachia – are released.

From BBC Jul. 27, 2026

But plaque can shed bacteria or bacterial products into the bloodstream, says Dr. George Hajishengallis, a professor at the University of Pennsylvania’s dental school specializing in microbiology and immunology.

From The Wall Street Journal Jul. 26, 2026

The gut microbiome consists of trillions of bacteria that live in the digestive system and affect many aspects of health, including the way the body experiences pain.

From Science Daily Jul. 25, 2026

Chicago’s water teemed with bacteria, thanks mainly to the Chicago River.

From "The Devil in the White City" by Erik Larson

Some governments also use Wolbachia, a naturally occurring bacterium found in about half of all insect species, to curb the spread of mosquito-borne diseases like dengue.

From BBC Jul. 23, 2026

The New York company said in a statement that so far its product had not tested positive for the bacterium Clostridium botulinum.

From Los Angeles Times Jun. 14, 2026

Only two decades ago, it was widely doubted by specialists that the Black Death was caused by the bacterium Yersinia pestis, the agent of the bubonic plague.

From The Wall Street Journal Jun. 12, 2026

A research team led by Drs. Se Hee Lee and Tae Woong Whon at WiKim focused on a kimchi-derived bacterium called Leuconostoc mesenteroides CBA3656.

From Science Daily May 18, 2026

Provided that each victim thereby infects on the average more than one new victim, the bacterium will spread, even though the first host happens to die.

From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond




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