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| mi·fep·ri·stone [ mi fépprə stn ] |
noun |
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| Definition: |
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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.
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| [Late 20th century. Contraction of aminophenyl + propyne + estradione (elements of the drug's chemical name) + -one] |
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