Source : Webster's Revised Unabridged Dictionary (1913)

Epiphyseal \Ep`i*phys"e*al\, Epiphysial \Ep`i*phys"i*al\,
   (Anat.)
   Pertaining to, or having the nature of, an epiphysis.

Source : WordNet®

epiphysial
     adj : relating to the epiphysis of a bone [syn: {epiphyseal}]