Also found in: Medical.
Located behind an axis of the body, as the lateral aspect of the lower leg or the medial aspect of the upper arm.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Anatomy) situated or occurring behind the axis of the body
2. (Anatomy) of or relating to the posterior part of a vertebrate limb
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
post•ax•i•al(poʊstˈæk si əl)
pertaining to or situated behind an axis of the body, esp. the posterior side of the axis of a limb.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.