accessory hemiazygous vein

/AE0 K S EH1 S ER0 IY0 EH0 M IY0 AH0 Z AY0 G AH0 S V EY0 N/
noun
  1. 1

    a vein formed by the union of the 4th to 7th posterior intercostal veins; empties into the azygos vein