- accessory hemiazygous vein as a noun:
- 1
accessory hemiazygous vein
noun
1 accessory hemiazygous vein
A vein formed by the union of the 4th to 7th posterior intercostal veins; empties into the azygos vein.
synonyms: accessory hemiazygos vein, vena hemiazygos accessoria.
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