cleft jaw(redirected from Cleft chin)
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either the mandible (lower jaw) or the maxilla (upper jaw), two opposing bony structures of the mouth of a vertebrate; they bear the teeth and are used for seizing prey, for biting, or for masticating food. See anatomic Table of Bones in the Appendices.
cleft jaw a cleft between the median nasal and maxillary processes through the alveolus; see also cleft palate. Called also gnathoschisis.
phossy jaw phosphonecrosis.
a congenital facial anomaly of the jaw resulting from failure of fusion of the mandibular prominences.
an abnormal jaw resulting from failure of the left and right mandibles to fuse properly during embryonic development.
cleft jaw(kleft jaw)
Congenital jaw anomaly resulting from failure of fusion of the mandibular prominences.