fluo·​ro·​ura·​cil ˌflu̇r-ō-ˈyu̇r-ə-ˌsil How to pronounce fluorouracil (audio)
: a fluorine-containing pyrimidine base C4H3FN2O2 used as a neoplastic agent to treat some kinds of cancer

Examples of fluorouracil in a Sentence

Recent Examples on the Web Rosen was one of more than 275,000 cancer patients in the United States who are infused each year with fluorouracil, known as 5-FU, or, as in Rosen’s case, take a nearly identical drug in pill form called capecitabine. Arthur Allen | Kff Health News, NBC News, 27 Mar. 2024 The Turtle Hospital on Marathon Key and the University of Florida’s Sea Turtle Hospital, working closely together, have used human anti-cancer drug treatments such as fluorouracil to decrease post-surgical recurrence of eye tumors in sea turtles. Jessica Alice Farrell, Smithsonian, 11 July 2018 The 16 drugs that Pfizer and Cipla will sell have unfamiliar names like vinblastine, bleomycin and fluorouracil. Donald G. McNeil Jr., New York Times, 7 Oct. 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'fluorouracil.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


fluor- + uracil

First Known Use

circa 1958, in the meaning defined above

Time Traveler
The first known use of fluorouracil was circa 1958

Dictionary Entries Near fluorouracil

Cite this Entry

“Fluorouracil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fluorouracil. Accessed 28 May. 2024.

Medical Definition


flu·​o·​ro·​ura·​cil ˌflu̇(-ə)r-ō-ˈyu̇r-ə-ˌsil, -ˌsəl How to pronounce fluorouracil (audio)
variants or 5-fluorouracil
: a fluorine-containing pyrimidine base C4H3FN2O2 used to treat some kinds of cancer
Last Updated: - Updated example sentences
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