orificium

(or-!-fish'I-um) [L.] Orifice, o. exter'num u'teri [BNA], os uteri externum, the mouth of the womb, the opening in the vaginal portion of the cervix uteri. o. inter'num u'teri [BNA], OS uteri ihternum, a slightly constricted portion of the cavity of the uterus marking the separation of the cervix from the corpus uteri, o. ure'- teris [BNA], the orifice of the ureter in the bladder, situated one at each upper and outer angle of the trigone, the lower angle being oocupied by the internal orifice of the urethra. o. ure'thise exter'nun i [BNA], meatus urinarius, (i) the slit-like opening of the urethra in the glans penis; (2) the external orifice of the urethra (in the female) in the vestibule, usually upon a slight elevation, the papilla urethrse. o. ute'tbxsB inter'num [BNA], the internal orifice of the urethra, at the anterior and inferior angle of the trigone, the upper and outer angles being occupied by the orifices of the ureters, o. Tagi'nse [BNA], the vaginal opening, the narrowest portion of the canal, in the floor of the vestibule behind the urethral orifice.