The Collaborative International Dictionary of English v.0.48:
Intervertebral \In`ter*ver"te*bral\, a. (Anat.) Between vertebr[ae]. -- In`ter*ver"te*bral*ly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
intervertebral adj 1: pertaining to the space between two vertebrae