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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.

The longstanding problem has worsened in recent years, and Coronado’s Central Beach was closed to bathers on 129 days in 2025 because of unsafe bacteria levels.

From Los Angeles Times • May 13, 2026

This is the Nebraska Biocontainment Unit, a high-tech facility designed to treat patients infected with highly lethal viruses or bacteria without transmitting them to hospital staff or the public.

From The Wall Street Journal • May 12, 2026

Prebiotic fiber, from sources like legumes, fortifies the good bacteria in your digestive system and, in turn, benefits your metabolism and immune system.

From MarketWatch • May 10, 2026

The Food and Drug Administration has repeatedly warned that unpasteurized dairy products can carry dangerous bacteria such as salmonella, listeria, and E. coli.

From Salon • May 9, 2026

James Garfield had been attacked first by Guiteau and then by bacteria.

From "Ambushed!" by Gail Jarrow




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