external urethral sphincter


ex·ter·nal u·re·thral sphinc·ter

[TA] muscle that constricts membranous urethra to retain urine in bladder; nerve supply, pudendal. Synonym(s): sphincter urethrae externus [TA], Guthrie muscle, musculus constrictor urethrae, musculus sphincter urethrae externus, sphincter muscle of urethra, Wilson muscle (1)