mifepristone

noun

mi·​fep·​ris·​tone ˌmi-fə-ˈpri-ˌstōn 

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

The Food and Drug Administration (FDA) gave the green light to a new generic version of mifepristone on Tuesday, Drugmaker Evita Solutions announced on its website. —Jordan King, MSNBC Newsweek, 3 Oct. 2025

Evita Solutions will join GenBioPro to sell the generic version of Danco Laboratories' mifepristone, which is used to terminate pregnancy. —Dan Morrison, USA Today, 2 Oct. 2025

Major medical groups, including the American College of Obstetricians and Gynecologists, have repeatedly called for more mifepristone accessibility. —Deidre McPhillips, CNN Money, 30 Sep. 2025

In June, the Supreme Court threw out a challenge to the FDA's expansion of access to mifepristone, ruling that the doctors and groups who brought the case lacked standing. —Pilar Arias, FOXNews.com, 30 Sep. 2025

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

Rhymes for mifepristone

• aldosterone
• anticyclone
• progesterone
• testosterone
• acetone
• anglophone
• baritone
• bourguignon
• buspirone
• chaperon
• chaperone
• cobblestone

Medical Definition

mifepristone

noun

mi·​fep·​ris·​tone ˌmi-fə-ˈpris-ˌtōn  mi-ˈfep-ri-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