Hypertext Webster Gateway: "thornback"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Thornback \Thorn"back`\, n.
1. (Zo["o]l.) A European skate ({Raia clavata}) having
thornlike spines on its back.
2. (Zo["o]l.) The large European spider crab or king crab
({Maia squinado}).
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