rectourethralis muscle

rec·to·u·re·thra·lis mus·cle

(rek'tō-yŭr'ē-thrā'lis mŭs'ĕl) Smooth muscle fibers that pass forward from the longitudinal muscle layer of the rectum to the membranous urethra in the male.
Synonym(s): musculus rectourethralis [TA] .