from The American Heritage® Dictionary of the English Language, 4th Edition
- 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a contraceptive in the form of a pill taken the morning after sexual intercourse
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a large dose of estrogen taken orally within 24 to 72 hours after intercourse; prevents implantation of a fertilized ovum and so acts as a contraceptive; commonly used after rape or incest
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