coitus interruptus
noun
coitus in·ter·rup·tus -ˌin-tə-ˈrəp-təs 
: coitus in which the penis is withdrawn prior to ejaculation to prevent the deposit of sperm into the vagina
Example Sentences
Recent Examples on the Web The question of sperm in precum usually comes up in reference to the pull-out method, also known as the withdrawal method (and coitus interruptus—sounds like a dinosaur, but OK). 
Kasandra Brabaw, SELF, 7 Mar. 2019 You were beaten by coitus interruptus imposed by the Church. Dana Snitzky, Longreads, 12 July 2018
Kasandra Brabaw, SELF, 7 Mar. 2019 You were beaten by coitus interruptus imposed by the Church. Dana Snitzky, Longreads, 12 July 2018 Word History
Etymology
borrowed from New Latin, "interrupted sexual intercourse"
First Known Use
1886, in the meaning defined above
Medical Definition
coitus interruptus
noun
coitus in·ter·rup·tus -ˌint-ə-ˈrəp-təs
: coitus in which the penis is withdrawn prior to ejaculation to prevent the deposit of sperm in the vagina
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