Ductus

(du&’-tus) [L.]. A duct. D. arteriosus, a short ve el in the fetus connecting the pulmonary artery with the aorta. D. auditor i us or cochlear is, the scala media of the cochlea. D. cuvieri. See Duct of Cttvier. D. venosus, a branch of the umbilical vein in the fetus which empties directly into the ascending vena cava. 248