Relating to or characterized by the absence of jaws, either evolutionarily or due to a birth defect.
From Greek a- (without) + gnathos (jaw) + -ic (relating to). Adjective form describing jawless characteristics.
Agnathic ancient fish were so successful despite lacking jaws that they invented a whole new way to eat—using a toothed sucker mouth to attach to other fish and drink their blood, like living vampires.
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