The Collaborative International Dictionary of English v.0.48:

Vertebrarterial \Ver`te*brar*te"ri*al\, a. (Anat.)
   Of or pertaining to a vertebra or vertebrae and an artery; --
   said of the foramina in the transverse processes of cervical
   vertebrae and of the canal which they form for the vertebral
   artery and vein.
   [1913 Webster]