postaxial

[ pohst-ak-see-uh l ]

/ poʊstˈæk si əl /

pertaining to or situated behind the axis of the body, especially the posterior side of the axis of a limb.

Origin of postaxial

First recorded in 1870–75; post- + axial

In the posterior limb the tibia and the hallux are pre-axial, the fibula and the fifth toe are postaxial.

The Vertebrate Skeleton |Sidney H. Reynolds
Each limb then has a dorsal surface, a ventral surface, an anterior or pre-axial edge, and a posterior or postaxial edge.

The Vertebrate Skeleton |Sidney H. Reynolds
The ulna (fig. 48, A, 3) or postaxial bone is a curved bone rather larger than the radius.

The Vertebrate Skeleton |Sidney H. Reynolds
The anterior part of the pre-axial border and posterior part of the postaxial border bear slight outgrowths.

The Vertebrate Skeleton |Sidney H. Reynolds

The biserial archipterygium consists of a segmented axial rod, bearing a praeaxial and a postaxial series of jointed rays.

Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 3 |Various

postaxial

/ (pəʊstˈæksɪəl) /

situated or occurring behind the axis of the body

of or relating to the posterior part of a vertebrate limb

postaxial

[ pōst-ăk′sē-əl ]

Posterior to the axis of the body or to the axis of a limb in the anatomical position.

Of or being the portion of a limb bud lying caudal to the axis of the limb.