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.
Prolonged skin damage greatly increases risks of bacterial infections that can quickly turn lethal. Andrew Paul, Popular Science, 5 Feb. 2026 Warming a meal completely takes about 15 minutes, with the temperature reaching 55 ºC (131 ºF) to ensure adequate heating that does not damage nutrients and prevents bacterial contamination. New Atlas, 4 Feb. 2026 Legislative action is required to repeal the vaccine mandates for polio, diphtheria (a bacterial infection), rubeola (measles), rubella (a viral infection, also called German measles), pertussis (whooping cough), mumps and tetanus. Doris Alvarez Cea, Florida Times-Union, 4 Feb. 2026 Keeping your feet in a warm, damp environment can promote bacterial and fungal growth, which can contribute to foot odor and potentially infection. Emily Kay Votruba, EverydayHealth.com, 3 Feb. 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.merriam-webster.com/dictionary/bacterial. Accessed 14 Feb. 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

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