1. A large vein that carries deoxygenated blood back to the heart, particularly referring to the superior or inferior vena cava
The superior vena cava is a major vein that returns blood from the upper body to the heart.
A veia cava superior é uma veia maior que retorna o sangue da parte superior do corpo ao coração.
2. Any significant vein in the circulatory system that is larger than a typical vein
The surgeon carefully examined the major veins during the procedure.
O cirurgião examinou cuidadosamente as veias maiores durante o procedimento.