accessory vertebral vein accessory vertebral vein /əkˈsɛsəri vɜrˈtibrəl veɪn/

noun

1. A vein that accompanies the vertebral vein but passes through the foramen of the transverse process of the 7th cervical vertebra and empties into the brachiocephalic vein  ( accessory vertebral vein , vena vertebralis accessoria )
   a vein that accompanies the vertebral vein but passes through the foramen of the transverse process of the 7th cervical vertebra and empties into the brachiocephalic vein