Definition of "jawless" []

• Lacking a jaw. (adjective)

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• "The containing group of jawed vertebrates and jawless fishes is vertebrata."
• "In going from amphioxus to jawless fish to jawed fish to land vertebrates we see an increase in complexity of the clotting cascade:"
• "Sure, the jawless fish is doing quite well with out Factor V …. but look what it does have."