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hyomandibular cleft


Definition: the cleft between the hyoid (second) and mandibular (first) pharyngeal arches of the embryo; the external acoustic meatus is developed from its dorsal portion.

Synonym(s): first pharyngeal groove, first visceral cleft

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.