What is the Medical term meaning within the skull?

There are four immovable joints found in the adult cranium that are referred to as sutures. The coronal suture is between the frontal bone and the parietal bone. The sagittal suture is between the two parietal bones. The lambdoidal suture is found between the occipital bone and the parietal bone. The squamosal suture is found between the parietal and the temporal bones.