azygos vein

noun

Definition of azygos vein

anatomy

  1. :  any of three veins which together drain the thoracic wall and much of the abdominal wall and which form a collateral circulation when either the inferior or superior vena cava is obstructed; especially :  a vein that receives blood from the right half of the thoracic and abdominal walls, ascends along the right side of the vertebral column, and empties into the superior vena cava When the superior vena cava is obstructed, blood flows through a collateral vascular network to the lower body and the inferior vena cava or the azygos vein. — Lynn D. Wilson et al., New England Journal of Medicine, 3 May 2007 — see also accessory hemiazygos vein hemiazygos vein

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Medical Dictionary

azygos vein

noun

Medical Definition of azygos vein

  1. :  any of a system of three veins which drain the thoracic wall and much of the abdominal wall and which form a collateral circulation when either the inferior or superior vena cava is obstructed; especially :  a vein that receives blood from the right half of the thoracic and abdominal walls, ascends along the right side of the spinal column, and empties into the superior vena cava—compare accessory hemiazygos vein, hemiazygos vein


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