coitus

noun
🔊/ˈkɔɪtəs/, 🔊/ˈkəʊɪtəs/
🔊/ˈkəʊɪtəs/
[uncountable] (medical医学 or formal)
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  1. sexual intercourse (= the physical activity of sex)
    Word Originmid 19th cent.: from Latin, from coire ‘go together’, from co- ‘together’ + ire ‘go’.