/ˌpōstəkˈsāl/ (post-uh-kay-zhal)

Definitions

1. adjective

relating to or situated on the posterior side of an axis

“The postaxial position of the new wing was crucial in its design.”

2. noun

a part or structure located on the posterior side of an axis

“The postaxial extension of the limb is an interesting example in evolutionary biology.”