Source : Webster's Revised Unabridged Dictionary (1913)

Epipterygoid \Ep`ip*ter"y*goid\, a. [Pref. epi- + pterygoid.]
   (Anat.)
   Situated upon or above the pterygoid bone. -- n. An
   epipterygoid bone or cartilage; the columella in the skulls
   of many lizards.