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Related to pharyngeal cleft: Reichert's cartilage
pharyngeal cleft or
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)