morning-after pill

(môr'nĭng-ăf'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.

(môr'nĭng-ăf'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.

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The noun has one meaning:

Meaning #1: 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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morning after pill