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mifepristone

mi·fep·ri·stone [ mi fépprə stn ]


noun 
Definition:
 
abortion drug: a drug that blocks the hormone progesterone, which is essential for maintaining pregnancy. Use: fetus abortion in the first few weeks after conception.

[Late 20th century. Contraction of aminophenyl + propyne + estradione (elements of the drug's chemical name) + -one]
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