misoprostol

noun

mi·​so·​pros·​tol ˌmī-sō-ˈprä-ˌstōl How to pronounce misoprostol (audio) -ˌstȯl How to pronounce misoprostol (audio)
: a synthetic prostaglandin analog C22H38O5 used to prevent stomach ulcers associated with NSAID use and to induce abortion in conjunction with mifepristone

Examples of misoprostol 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.
When misoprostol is used alone, bleeding will typically begin within one to four hours. Jen Christensen, CNN Money, 8 May 2026 Instead, women would probably be forced to use the second medication, misoprostol, alone. Los Angeles Times, 7 May 2026 Is the misoprostol-alone regime safe? Mara Gordon, NPR, 4 May 2026 The medications known as mifepristone and misoprostol are approved by the U.S. Food and Drug Administration for use in the first 10 weeks of pregnancy. Cindy Krischer Goodman, Sun Sentinel, 2 May 2026 See All Example Sentences for misoprostol

Word History

Etymology

miso- (perhaps from methyl + iso-) + prostaglandin + -ol entry 1

First Known Use

1982, in the meaning defined above

Time Traveler
The first known use of misoprostol was in 1982

Browse Nearby Words

Cite this Entry

“Misoprostol.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/misoprostol. Accessed 15 May. 2026.

Medical Definition

misoprostol

noun
mi·​so·​pros·​tol ˌmī-sō-ˈpräs-ˌtōl How to pronounce misoprostol (audio) -ˌtȯl How to pronounce misoprostol (audio)
: a synthetic prostaglandin analog C22H38O5 used to prevent stomach ulcers associated with NSAID use and to induce abortion in conjunction with RU-486

More from Merriam-Webster on misoprostol

Love words? Need even more definitions?

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

More from Merriam-Webster