Quillback meaning

kwĭl'băk'
A North American freshwater fish (Carpiodes cyprinus) that has one ray of the dorsal fin extending conspicuously beyond the others.
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A North American freshwater fish (Carpiodes cyprinus) of the sucker family, with the front margin of the dorsal fin quill-like and elongate.
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Carpiodes cyprinus, a freshwater fish of the sucker family with a long filament that extends back from the dorsal fin, native to the eastern and central United States.
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Origin of quillback