Source : Webster's Revised Unabridged Dictionary (1913)

Procephalic \Pro`ce*phal"ic\, a. [Pref. pro- + cephalic.]
   (Zo["o]l.)
   Pertaining to, or forming, the front of the head.

   {Procephalic lobe} (Zo["o]l.), that part of the head of an
      invertebrate animal which is in front of the mouth.