os frontale - the large cranial bone forming the front part of the cranium: the forehead and the upper part of the orbitsglabella, mesophyron - a smooth prominence of the frontal bone between and above the eyebrows; the most forward projecting point of the forehead in the midline at the level of the supraorbital ridges metopion - the craniometric point midway between the frontal eminences of the skull ophryon - the craniometric point in the midline of the forehead immediately above the orbits membrane bone - any bone that develops within membranous tissue without previous cartilage formation; e.g. the clavicle and bones of the skull |