The Collaborative International Dictionary
Hypapophysial
Hypapophysis \Hy`pa*poph"y*sis\, n.; pl. Hypapophyles. [NL. See Hypo-, and Apophysis.] (Anat.) A process, or other element, of a vertebra developed from the ventral side of the centrum, as h[ae]mal spines, and chevron bones. -- Hy`pa*po*phys"i*al, a.
Wiktionary
hypapophysial
a. Relating to the hypapophysis