metopic adjective. 
[mɪ'tɒpɪk] L19.[from Greek metōpon forehead + -IC.]Of or pertaining to the forehead; frontal; (of a skull) exhibiting metopism.
 ■   'metopism noun continued presence in the skull of an open frontal suture beyond infancy 
L19.  [TahlilGaran] English Dictionary ▲