mandibula - the lower jawbone in vertebrates; it is hinged to open the mouthgnathion - the most inferior point of the mandible in the midline gonion - the craniometric point on either side at the apex of the lower jaw pogonion - the craniometric point that is the most forward-projecting point on the anterior surface of the chin symphysion - the most forward point of the alveolar process of the mandible jaw - the part of the skull of a vertebrate that frames the mouth and holds the teeth |