fluo·​ro·​ura·​cil | \ ˌflu̇r-ō-ˈyu̇r-ə-ˌsil How to pronounce fluorouracil (audio) , -ˌsəl, ˌflȯr- \

Definition of fluorouracil

: 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 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, "Should We Share Human Cancer Treatments With Tumorous Turtles?," 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, "As Cancer Tears Through Africa, Drug Makers Draw Up a Battle Plan," 7 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fluorouracil.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of fluorouracil

circa 1958, in the meaning defined above

History and Etymology for fluorouracil

fluor- + uracil

Keep scrolling for more

Learn More about fluorouracil

Time Traveler for fluorouracil

Time Traveler

The first known use of fluorouracil was circa 1958

See more words from the same year

Statistics for fluorouracil

Cite this Entry

“Fluorouracil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fluorouracil. Accessed 18 May. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for fluorouracil


flu·​o·​ro·​ura·​cil | \ ˌflu̇(-ə)r-ō-ˈyu̇r-ə-ˌsil, -ˌsəl How to pronounce fluorouracil (audio) \
variants: or 5-fluorouracil \ ˈfīv-​ How to pronounce fluorouracil (audio) \

Medical Definition of fluorouracil

: a fluorine-containing pyrimidine base C4H3FN2O2 used to treat some kinds of cancer

Comments on fluorouracil

What made you want to look up fluorouracil? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Words Used by Nabokov Quiz

  • image1676440788
  • Choose the best definition or synonym for the word in bold: "There are some eructations that sound like cheers—at least, mine did." Lolita
Name That Thing

Test your visual vocabulary with our 10-question challenge!


Anagram puzzles meet word search.

Love words? Need even more definitions?

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