Noun | 1. | ![]() inferior pulmonary vein, vena pulmanalis inferior - either of two pulmonary veins (left and right) returning blood from the inferior lobes of the lungs superior pulmonary vein, vena pulmonalis superior - either of two pulmonary veins (left and right) returning blood from the superior lobes of the lungs lung - either of two saclike respiratory organs in the chest of vertebrates; serves to remove carbon dioxide and provide oxygen to the blood vein, vena, venous blood vessel - a blood vessel that carries blood from the capillaries toward the heart; "all veins except the pulmonary vein carry unaerated blood" |