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thornback definition

thorn·back (t̸hôrn′bak′)

noun

  1. any of several European rays with many tubercles on the back and a double row of spines on the tail
  2. a large European spider crab (Maja squinado) with a spiny back
  3. a guitarfish (Platyrhinoidis triseriata) with spines on the back, found in the Pacific

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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