epaxial

adjective
ep·​ax·​i·​al | \ (ˈ)ep-ˈak-sē-əl How to pronounce epaxial (audio) \
variants: also epaxonic \ ˌep-​ˌak-​ˈsän-​ik How to pronounce epaxonic (audio) \

Medical Definition of epaxial

: located above or on the dorsal side of an axis