morningafter pill

morning-after pill

[mawr-ning-af-ter, -ahf-]
noun Pharmacology.
a contraceptive pill containing only an estrogen and used by women within a few hours after sexual intercourse.

Origin:
1955–60

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Collins
World English Dictionary
morning-after pill
 
n
an oral contraceptive that is effective if taken some hours after intercourse

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

morning-after pill morn·ing-af·ter pill (môr'nĭng-āf'tər)
n.
A pill containing a drug, especially an estrogen or estrogen substitute such as diethylstilbestrol, that prevents implantation of a fertilized ovum and is therefore effective as a contraceptive after sexual intercourse.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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