D defs.my
Entry 2 senses Webster, 1913

Intromittent

· In·tro·mit·tent · IPA
01 a. Throwing, or allowing to pass, into or within.
  1. 1.
    Throwing, or allowing to pass, into or within.
  2. 2.
    Used in copulation; -- said of the external reproductive organs of the males of many animals, and sometimes of those of the females.(Zool.)