mifepristone

noun

mi·​fep·​ris·​tone ˌmi-fə-ˈpri-ˌstōn How to pronounce mifepristone (audio)
mi-ˈfe-pri-ˌstōn
: a drug C29H35NO2 taken orally to induce abortion especially early in pregnancy by blocking the body's use of progesterone

called also RU-486

Examples of mifepristone 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 plaintiffs vowed to continue fighting mifepristone access after their defeat at the Supreme Court. Lindsay Whitehurst, Chicago Tribune, 17 Jan. 2025 Last year, the Supreme Court dismissed that lawsuit, saying that private parties had no legal basis to challenge access to mifepristone. Nathaniel Weixel, The Hill, 16 Jan. 2025 The first, mifepristone, blocks the hormone progesterone, which is critical for a pregnancy to continue. Kaitlin Sullivan, NBC News, 17 Dec. 2024 Out of nearly 6 million women who’ve taken mifepristone in the U.S. since 2000, 32 deaths were reported to the FDA through 2022, regardless of whether the drug played a role. Kavitha Surana, ProPublica, 16 Sep. 2024 See all Example Sentences for mifepristone 

Word History

Etymology

perhaps from amino + fe- (alteration of phen-) + pri- (alteration of prop-) + estradiol + -one

First Known Use

1985, in the meaning defined above

Time Traveler
The first known use of mifepristone was in 1985

Dictionary Entries Near mifepristone

Cite this Entry

“Mifepristone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mifepristone. Accessed 22 Jan. 2025.

Medical Definition

mifepristone

noun
mi·​fep·​ris·​tone ˌmi-fə-ˈpris-ˌtōn How to pronounce mifepristone (audio) mi-ˈfep-ri-ˌstōn How to pronounce mifepristone (audio)
: a drug C29H35NO2 taken orally to induce abortion especially early in pregnancy by blocking the body's use of progesterone

called also RU-486

More from Merriam-Webster on mifepristone

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