Source : Webster's Revised Unabridged Dictionary (1913)

Stephanion \Ste*pha"ni*on\, n. [NL., from Gr. ? a crown.]
   (Anat.)
   The point on the side of the skull where the temporal line,
   or upper edge of the temporal fossa, crosses the coronal
   suture.

Source : WordNet®

stephanion
     n : the craniometric point on the coronal suture above the
         acoustic meatus