fortress, fort - a fortified defensive structure. merlon - a solid section between two crenels in a crenelated battlement. bulwark, rampart, wall - an embankment built around a space for defensive purposes; they stormed the ramparts of the city; they blew the trumpet and the walls came tumbling down.
Definition of OCCIPITAL BONE. : a compound bone that forms the posterior part of the skull and bears a condyle by which the skull articulates with the atlas.See occipital bone defined for kids.ADVERTISEMENT. a compound bone that forms the posterior part of the skull and bears a condyle by which the skull articulates with the atlas. See occipital bone defined for kids.
occipital bone, the cuplike bone at the back of the skull, marked by a large opening, the foramen magnum, that communicates with the vertebral canal. The occipital bone articulates with the two parietal bones, the two temporal bones, the sphenoid, and the atlas.ccipital bone the bone constituting the back and part of the base of the skull. See anatomic Table of Bones in the Appendices. parietal bone one of two bones forming the sides and roof of the cranium. See anatomic Table of Bones in the Appendices.