chloramphenicol

noun

: a broad-spectrum antibiotic C11H12Cl2N2O5 isolated from cultures of a soil actinomycete (Streptomyces venezuelae) or prepared synthetically

Examples of chloramphenicol 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 antibiotics facing export limits are tinidazole, metronidazole, chloramphenicol, erythromycin salts, neomycin, clindamycin salts and ornidazole. — Vindu Goel, New York Times, 10 Mar. 2020 This Spanish outbreak, though, had a different cause, the importation of the cfr gene, which also mediates resistance to the older drugs clindamycin and chloramphenicol, apparently on a plasmid, possibly from a staph strain common in cows. — Maryn McKenna, WIRED, 15 June 2010

Word History

Etymology

chlor- + amide + phen- + nitr- + glycol

First Known Use

1949, in the meaning defined above

Time Traveler
The first known use of chloramphenicol was in 1949

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Cite this Entry

“Chloramphenicol.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chloramphenicol. Accessed 1 Oct. 2026.

Medical Definition

: a broad-spectrum antibiotic C11H12Cl2N2O5 isolated from cultures of a soil actinomycete of the genus Streptomyces (S. venezuelae) or prepared synthetically

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