It is the point where the frontal bone and parietal bones meet.
For example, there are wide pits on the back of the frontal bone.
The frontal bones are elongated, about 70% longer than wide.
The doctor had cleaned away some of the shattered frontal bone and blood.
The frontal bones have a transverse ridge at their back.
The biggest part of the frontal bone is under the forehead.
The skin was pale on the frontal bones where the hair would fall when he stood up.
"He said he took it out of my frontal bone."
It happens when the frontal bone becomes bigger because of a medical condition.
The feeling is like being behind someone else's frontal bone.