sexual intercourse

sexual relations, sexual process

Sexual intercourse or copulation is the union of the sex organs of two sexually reproducing animals. The two entities may be of opposite sexes, or they may be hermaphroditic, as is the case with snails. This is sometimes called just sex, while the term is also colloquially used at times to include oral sex and anal sex.
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Sexual intercourse n. 1. Coitus between humans. 2. Sexual union between humans involving genital contact other than vaginal penetration by the penis. [more]Sexual intercourse - Community and Resources

Noun
1. the act of sexual procreation between a man and a woman; the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur
(synonym) intercourse, sex act, copulation, coitus, coition, sexual congress, congress, sexual relation, relation, carnal knowledge
(hypernym) sexual activity, sexual practice, sex, sex activity
(hyponym) defloration
(part-meronym) insemination

Penetration by the penis of a woman's labia. - (read more on Sexual intercourse)