abortion pill abortion pill /əˈbɔːrʃən pɪl/

noun

1. 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  ( abortion pill , mifepristone , RU 486 )
   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