bacterial

adjective

bac·​te·​ri·​al bak-ˈtir-ē-əl How to pronounce bacterial (audio)
: of, relating to, or caused by bacteria
bacterial infection
bacterially adverb

Examples of bacterial in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Pneumococcal Adults 50 and older are now eligible for the pneumococcal vaccine, which protects against a bacterial infection that can cause pneumonia and other serious illnesses, Nadolne said. Rachel Brown Kirkland, AJC.com, 21 Apr. 2026 Since the discovery of the bacterial flagellar motor in the 1970s, biologists and creationists alike have marveled at its design like medieval architects staring with awe at the dome of the Pantheon built by their Roman ancestors. Quanta Magazine, 20 Apr. 2026 Throat pain is also a possible indicator of strep throat, which is a bacterial infection. Eva Flowe april 20, Charlotte Observer, 20 Apr. 2026 People who live together share up to 30% of their gut bacterial strains, 38% of their oral microbiome, and have the most similar skin microbiomes. Mira Miller, Verywell Health, 20 Apr. 2026 See All Example Sentences for bacterial

Word History

First Known Use

1869, in the meaning defined above

Time Traveler
The first known use of bacterial was in 1869

Browse Nearby Words

Cite this Entry

“Bacterial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.grautoblog.com/dictionary/bacterial. Accessed 26 Apr. 2026.

Kids Definition

bacterial

adjective
bac·​te·​ri·​al bak-ˈtir-ē-əl How to pronounce bacterial (audio)
: of, relating to, or caused by bacteria

Medical Definition

bacterial

adjective
bac·​te·​ri·​al bak-ˈtir-ē-əl How to pronounce bacterial (audio)
: of, relating to, or caused by bacteria
a bacterial chromosome
bacterial infection
bacterial endocarditis
bacterially adverb

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