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.
Noun. 1. occipital cortex-that part of the cerebral cortex in either hemisphere of the brain lying in the back of the head. occipital lobe.calcarine fissure, calcarine sulcus-a sulcus in the mesial surface of the occipital lobe of the cerebrum.cerebral cortex, cerebral mantle, cortex, pallium-the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum.occipital gyrus-any of the convolutions of the outer surface of the occipital lobe of the cerebrum.erebral cortex, cerebral mantle, cortex, pallium-the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum. occipital gyrus-any of the convolutions of the outer surface of the occipital lobe of the cerebrum.