azygos vein

Từ điển WordNet v3.1 - WordNet Dictionary

noun

one of a system of veins that drain the thoracic and abdominal walls;
arises as a continuation of the right ascending lumbar vein and terminates in the superior vena cava
• Syn:
azygous vein, vena azygos
• Hypernyms:
vein, vena, venous blood vessel