Chicago Daily Herald New Scientist Geoffrey Cowley Note: While antibiotics are effective mainly against bacteria, they are sometimes used to treat protozoal infections. Some consider antibiotics to include only those derived fully or partly from microorganisms and exclude synthetic forms from this class of drugs.
Examples of antibiotic in a Sentence
Ben Coxworth, New Atlas, 13 June 2025
Your doctor can try to determine what kind of bacteria is causing the issue, then offer treatment such as antibiotics to help.
—Korin Miller, SELF, 11 June 2025
Patty Weasler, Verywell Health, 11 June 2025
That’s the gist of the growing threat posed by antibiotic resistance, which has contributed to millions of deaths since 1990 and is anticipated to contribute to millions more by 2050.
—Sam Walters, Discover Magazine, 4 June 2025
See All Example Sentences for antibiotic
Cite this Entry
“Antibiotic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antibiotic. Accessed 19 Jun. 2025.
Copy CitationMedical Definition
antibiotic
1 of 2 adjective
antibiotic
2 of 2 nounNote: While antibiotics are effective mainly against bacteria, they are sometimes used to treat protozoal infections. Some consider antibiotics to include only those derived fully or partly from microorganisms and exclude synthetic forms from this class of drugs.
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