pharyngeal cleft


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Related to pharyngeal cleft: Reichert's cartilage

pharyngeal cleft

or

pharyngeal groove

n.

pharyngeal cleft

A primitive structure seen in the 5-week embryo, only part of which (the dorsal aspect of the 1st pharyngeal cleft) gives rise to the external auditory canal; the 2nd, 3rd and 4th pharyngeal clefts undergo atrophy and are covered by the 2nd pharyngeal arch.

pha·ryn·ge·al groove

(făr-in'jē-ăl grūv)
The ectodermal groove between two pharyngeal arches in the human embryo.
Synonym(s): branchial cleft, pharyngeal cleft.