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.
Health risks include the potential for bacterial contamination, which may result in illness or infection, including Salmonella. Cheryl V. Jackson, IndyStar, 29 Jan. 2026 Miso contains several bacterial strains as long as it isn't boiled or heated. Amber J. Tresca, Verywell Health, 29 Jan. 2026 Neither of those bacterial detections appears to have been from the incoming water supply, officials said. Paula Wethington, CBS News, 28 Jan. 2026 To reduce the risk of bacterial growth and contamination, store raw meat in a glass container. Olivia McIntosh, Martha Stewart, 26 Jan. 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

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Cite this Entry

“Bacterial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bacterial. Accessed 31 Jan. 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

More from Merriam-Webster on bacterial

Last Updated: - Updated example sentences
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