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jawless fish

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noun jaw·less fish \ˈjȯ-ləs-\

Definition of jawless fish

  1. :  any of the taxonomic group (Agnatha) of primitive vertebrates without jaws including cyclostomes and extinct related forms — compare bony fish, cartilaginous fish



Circa 1941

First Known Use of jawless fish

circa 1941


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a jerking and twitching of the body

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