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Meaning of quillback

quill•back

Pronunciation: (kwil'bak"), [key]
— pl. -backs, -back.
  1. a carpsucker, Carpiodes cyprinus, inhabiting waters in the central and eastern U.S., having one ray of the dorsal fin greatly elongated. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.