from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. RU 486.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A steroid pharmaceutical used to induce abortion, or as an emergency contraceptive.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. 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


(a)mi(no) + alteration of phe(nyl) + pr(opyl) + alteration of est(radiol) + -one.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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