The Collaborative International Dictionary of English v.0.48:

Post-temporal \Post-tem"po*ral\, a. [Pref. post- + temporal.]
   (Anat.)
   Situated back of the temporal bone or the temporal region of
   the skull; -- applied especially to a bone which usually
   connects the supraclavicle with the skull in the pectoral
   arch of fishes. -- n. A post-temporal bone.
   [1913 Webster]