accessory hemiazygous vein

Thesaurus

Noun

1.accessory hemiazygous vein - a vein formed by the union of the 4th to 7th posterior intercostal veins; empties into the azygos veinaccessory hemiazygos vein, vena hemiazygos accessoriavein, vena, venous blood vessel - a blood vessel that carries blood from the capillaries toward the heart; "all veins except the pulmonary vein carry unaerated blood"