azygos vein

noun

Medical Definition of azygos vein

: 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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Cite this Entry

“Azygos vein.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/azygos%20vein. Accessed 23 Sep. 2021.

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