coitus

名词 coitus:

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
   同义词：sexual intercourse, intercourse, sex act, copulation, coition, sexual congress, congress, sexual relation, relation, carnal knowledge

co.i.tus

n.（名词）
Sexual union between a male and a female involving insertion of the penis into the vagina.
性交，交媾：雄性阴茎插入雌性阴道的雌雄性间的交合

来源：
Latin [from past participle of] coore [to copulate]
拉丁语 [] 源自coore的过去分词 [交配]
co- [co-]
co- [前缀,表.相互.]
ore [to go, come] * see ei-
ore [走，来] *参见 ei-

【引伸】
co.ital
adj.（形容词）
co.itally
adv.（副词）