Mifepristone
noun ·Rare ·Advanced level
Definitions
- 1 A steroid medication that inhibits the action of progesterone, typically given orally in combination with misoprostol in early pregnancy to induce abortion. uncountable
"Now a year later, as the courts consider the fate of mifepristone and abortion providers gird for the possibility of a miso-only protocol, Cristina says that she’s grateful she was able to end her unwanted pregnancy, although she knows not everyone has access to the same resources […]"
- 2 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 wordnet
Example
More examples"Now a year later, as the courts consider the fate of mifepristone and abortion providers gird for the possibility of a miso-only protocol, Cristina says that she’s grateful she was able to end her unwanted pregnancy, although she knows not everyone has access to the same resources […]"
Etymology
From (a)mi(no)phe(nyl) + pr(opargyl) + ist- (“alteration of (o)est(radiol)”) + -one.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.