emissarium

(em'i'-sa'ri-um) [L. an outlet.] Emi ary, an emi ary vein. e. condyloid'eum [BNA], connecting the transverse sinus and the external vertebral venous plexuses, e. mastoid'eum [BNA], connecting the transverse sinus with the occipital vein or one of the radicles of the external jugular, e. occipita'le [BNA], an inconstant ve el connecting the diploic or occipital veins with the con flu ens sinuum. e. parietale [BNA], connecting the superior sagittal sinus with the extracranial veins.