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Medical Term:

hyomandibular cleft


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

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.