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Meaning of postaxial

post•ax•i•al

Pronunciation: (pōst-ak'sē-ul), [key]
— adj. Anat., Zool.
  1. pertaining to or situated behind the axis of the body, esp. the posterior side of the axis of a limb.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.