coitus interruptus

noun

1. （防止受孕的）体外射精，性交中断
   an act of sexual intercourse in which the man removes his penis from the woman's body before he ejaculates , in order to prevent the woman from becoming pregnant

1. I just employed the most ancient form of birth control Coitus Interruptus, as the Romans called it.
   我刚才使用最古老的避孕法，那就是古代罗马人所称的性〈！

noun

1. a method of birth control in which coitus is initiated but the penis is deliberately withdrawn before ejaculation

   Synonym:    withdrawal methodwithdrawalpulling outonanism