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.
The disease, commonly called Hib, is a bacterial infection that can sometimes cause problems that are easy to treat. Elizabeth Robinson, NBC news, 2 Apr. 2026 Raw milk and its products carry the risk of harmful bacterial contamination as has been borne out in numerous outbreak investigations such as the current one. Katia Hetter, CNN Money, 1 Apr. 2026 Parabens Parabens are chemical preservatives that help prolong the shelf life of deodorants and other skincare products by preventing mold and bacterial growth. Bestreviews, Chicago Tribune, 31 Mar. 2026 The cube strength of the bacterial concrete was ~30 MPa after 7 days, and the 28-day strength is comparable to that of normal concrete. Srishti Gupta, Interesting Engineering, 31 Mar. 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 6 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

More from Merriam-Webster on bacterial

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster