bregma

from WordNet (r) 3.0 (2006)

bregma
    n 1: the craniometric point at the junction of the sagittal and
         coronal sutures at the top of the cranium

from The Collaborative International Dictionary of English v.0.48

Bregma \Breg"ma\, n. [Gr. ? the front part of the head: cf. F.
   bregma.] (Anat.)
   The point of junction of the coronal and sagittal sutures of
   the skull.
   [1913 Webster]