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.
cleft jaw(kleft jaw)
Congenital jaw anomaly resulting from failure of fusion of the mandibular prominences.