prefrontal

from WordNet (r) 3.0 (2006)

prefrontal
    adj 1: anterior to a frontal structure; "a prefrontal bone";
           "prefrontal lobes"

from The Collaborative International Dictionary of English v.0.48

Prefrontal \Pre*fron"tal\, a. (Anat. & Zool.)
   Situated in front of the frontal bone, or the frontal region
   of the skull; ectethmoid, as a certain bone in the nasal
   capsule of many animals, and certain scales of reptiles and
   fishes. -- n. A prefrontal bone or scale.
   [1913 Webster]