gnatho-, gnath-, -gnatha, -gnathan, -gnath, -gnathia, -gnathic, -gnathous
The jaw is the name applied to the bones which contain the teeth.
The two upper jaw-bones, the maxillae, are firmly attached to the other bones of the face.
The lower jaw, the mandible, is shaped in a form similar to that of a horseshoe, and, after the first year of life, it consists of a single bone.
It forms a hinge-joint with the squamous part (thin, plate-like section) of the temporal bone, immediately in front of the ear.
Both the upper and the lower jaw-bones include deep sockets known as alveoli, which contain the roots of the teeth.
2. Having the mouth parts ventral (situated on or close to the abdomen) and posterior to the cranium (toward or situated at the back of the head).
2. Having a face without a projecting jaw.
2. Straight jaws which have the front of the head, or the skull, nearly perpendicular, not retreating backwards above the jaws.