A rare congenital condition in which a person or animal is born without a lower jaw.
From Greek a- (without) + gnathos (jaw) + -ia (condition). Medical term describing the absence of jaw development.
Agnathia is an extremely severe birth defect that's incompatible with life in mammals—babies born with it cannot breathe, eat, or survive, making it one of the rarest and most tragic fetal conditions.
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