Entry 1 sense Webster, 1913 Sincipital /sĭnsĭʹpĭtəl/ · Sin·cip·i·tal · IPA /sɪnˈsɪpɪtəl/ 01 a. Of or pertaining to the sinciput; being in the region of the sinciput. 1. Of or pertaining to the sinciput; being in the region of the sinciput.(Anat.)