Lewis & Short

admissūra, ae, f. [admitto], the admitting of a male to a female, Varr. R. R. 2, 1 med.; so id. ib. 2, 4, 8; Col. 6, 24, 1; Plin. 8, 42, 66, § 164; Stat. S. 5, 2, 24; Vulg. Gen. 30, 42.