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Pronunciation: post-ak'se-al


  1. Posterior to the axis of the body or any limb, the latter being in the anatomic position.
  2. Denoting the portion of a limb bud that lies caudal to the axis of the limb: the ulnar aspect of the upper limb and the fibular aspect of the lower limb.
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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.