The Collaborative International Dictionary
Procephalic
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.
Wiktionary
procephalic
a. (context zoology English) Relating to, or forming, the front of the head.