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Located behind an axis of the body, as the lateral aspect of the lower leg or the medial aspect of the upper arm.

post·ax′i·al·ly adv.


1. (Anatomy) situated or occurring behind the axis of the body
2. (Anatomy) of or relating to the posterior part of a vertebrate limb


(poʊstˈæk si əl)

pertaining to or situated behind an axis of the body, esp. the posterior side of the axis of a limb.
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References in periodicals archive ?
In Ambystoma mexicanum, two major axes of development are observed: a proximodistal axis initiates at the humerus/femur, radius/tibia, ulna/fibula and extends to other mesopodials, while an anteroposterior (digital) axis arises on the anterior (preaxial) border and development of both digits and distal mesopodials progresses posteriorly (postaxially) (fig.
The anlage of U extends distally and postaxially to a bifurcation that contains the anlagen of the intermedium (i) and the ulnare (u); i then segments to produce a centrale (c).
The anlage of Fi bifurcates postaxially to form i and the fibulare (f); i later segments to form c.