The basion is part of the human body`s musculoskeletal system and is located on the skull. Anatomically it can be identified as the midpoint on the anterior margin of the foramen magnum on the occipital bone. It is a cephalometric landmark. ==Additional images== File:Occipital bone Basion - animation01.gif|Human skull seen from below (basion show.... Found on http://en.wikipedia.org/wiki/Basion
Ba'si·on noun [ Greek ba`sis a base.] (Anat.) The middle of the anterior margin of the great foramen of the skull. Found on http://www.encyclo.co.uk/webster/B/19