caput

caput (http://definr.com/caput)

     n 1: a headlike protuberance on an organ or structure; "the caput
          humeri is the head of the humerus which fits into a
          cavity in the scapula"
     2: the upper or front part of the body in animals; contains the
        face and brains; "he stuck his head out the window" [syn:
        head]