n. 交媾, 性交

[医] 性交, 交媾

[ noun ]
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
<noun.act>

Coition \Co*i"tion\, n. [L. coitio, fr. coire to come together;
co- + ire to go.]
A coming together; sexual intercourse; copulation. --Grew.