‖Ve″na (?), n.; pl.Venæ (#). [L. See Vein.] A vein.
Vena cava; pl.Venæ cavæ. (Anat.) Any one of the great systemic veins connected directly with the heart.— Vena contracta. (Hydraulics) The contracted portion of a liquid jet at and near the orifice from which it issues. — Vena portæ; pl.VenÆ portæ. (Anat.) The portal vein of the liver. See under Portal.