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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.

When bacteria spread into the tissues surrounding the tooth root, the immune system reacts.

From Science Daily • May 16, 2026

However, research suggests the MenB vaccine doesn't necessarily prevent transmission of the infection from person to person, doesn't target all the different B bacteria strains and doesn't provide very long-term protection.

From BBC • May 15, 2026

The high-tech “hotel” was designed to treat patients infected with highly lethal viruses or bacteria without transmitting them.

From The Wall Street Journal • May 15, 2026

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

Sore throats this severe were usually caused by strep bacteria or the mono virus, she said.

From "Educated" by Tara Westover




Vocabulary lists containing bacteria


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