hyomandibular cleft

(redirected from first visceral cleft)
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hy·o·man·dib·u·lar 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.

hy·o·man·dib·u·lar cleft

(hīō-man-dibyū-lăr kleft)
Cleft between the hyoid (second) and mandibular (first) pharyngeal arches of the embryo; external acoustic meatus is developed from its dorsal portion.
Synonym(s): first pharyngeal groove, first visceral cleft.
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