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cleft palate
a cleft from front to back along the middle of the palate, or roof, of the mouth, caused by the failure of the two parts of the palate to join in prenatal development
See cleft palate in American Heritage Dictionary 4
noun
A congenital fissure in the roof of the mouth, resulting from incomplete fusion of the palate during embryonic development. It may involve only the uvula or extend through the entire palate.
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