Definition of "coitus"

coitus

/ˈkəʊ.ɪ.təs/

noun
countable and uncountable, plural coituses
1. (formal or humorous) Sexual intercourse, especially involving penile-vaginal penetration.
  Quotations
  Wolowitz: Hang on. There really is a lady here?Leonard: Uh-huh.Wolowitz: And you want us out because you’re anticipating coitus?Leonard: No, she’s just a friend.Wolowitz: So she’s available for coitus?Leonard: No, she’s – –
  2006 October 2nd, Chuck Lorre and Bill Prady, The Big Bang Theory, “Pilot”, screenplay (revised first draft), act one, scene A (page 26)