hypogastric vein, internal iliac vein - a vein that unites with the external iliac vein to form the common iliac vein

external iliac vein - a continuation of the femoral vein; unites with the internal iliac vein to form the common iliac vein

common iliac vein - formed by the internal and external iliac veins; unites with its fellow from the opposite side of the body to form the inferior vena cava

vein, vena, venous blood vessel - a blood vessel that carries blood from the capillaries toward the heart; all veins except the pulmonary carry unaerated blood