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A synthetic steroid, C29H35NO2, that blocks the action of progesterone and is used in combination with misoprostol to induce abortion in early pregnancy. Also called RU 486.
(Pharmacology) an antiprogestogenic steroid, used in the medical termination of pregnancy. Formula: C29H35NO2
[C20: from aminophenol + propyne + oestradiol + -one]
mif•e•pris•tone(ˌmɪf əˈprɪs toʊn)
an antigestational drug that prevents a fertilized egg from attaching to the uterine wall by blocking the action of progesterone.
[1985–90; probably alter. of (a)mi(no)phe(nol) + pr(opyl) + est(radiol) + -one]
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|Noun||1.||mifepristone - an abortion-inducing drug (trade name RU_486) developed in France; when taken during the first five weeks of pregnancy it blocks the action of progesterone so that the uterus sloughs off the embryo|