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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.

Infection can occur when Legionella — which appears naturally in environments such as lakes and streams — gets into building water systems and people breathe in mist containing the bacteria, according to the U.S.

From Los Angeles Times • May 18, 2026

The most severe form of Legionella bacteria infection leads to Legionnaires’ disease, a serious and potentially deadly type of pneumonia, the CDC says.

From Los Angeles Times • May 18, 2026

Root canal treatment works by removing infected tissue inside the tooth and sealing the area to prevent bacteria and toxins from spreading into surrounding tissues.

From Science Daily • May 16, 2026

Small amounts of salt in food can help preserve it by preventing bacteria from growing.

From BBC • May 15, 2026

Stuff like xanthan gum, which is made from bacteria; Carbopol, which is an acrylic polymer like house paint; and gelatin, which is made from cow cartilage.

From "Challenger Deep" by Neal Shusterman




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