mandibulofacial dysostosis

man·di·bu·lo·fa·cial dysostosis

noun \man-ˌdib-yə-lō-ˌfā-shəl-\

Definition of MANDIBULOFACIAL DYSOSTOSIS

: a dysostosis of the face and lower jaw inherited as an autosomal dominant trait and characterized by bilateral malformations, deformities of the outer and middle ear, and a usually smaller lower jaw—called also Treacher Collins syndrome