intromission

noun

in·​tro·​mis·​sion ˌin-trə-ˈmi-shən 

: the act or process of intromitting

especially : the insertion or period of insertion of the penis in the vagina in copulation

Word History

Etymology

French, from Middle French, from Medieval Latin intromission-, intromissio, from Latin intromittere

First Known Use

1601, in the meaning defined above

Medical Definition

intromission

noun

in·​tro·​mis·​sion ˌin-trə-ˈmish-ən 

: the insertion or period of insertion of the penis in the vagina in copulation