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eurypterid (n.)
[eurypterid 词源字典]
fossil swimming crustacean of the Silurian and Devonian, 1874, from Greek
eurys
"broad, wide" (see
eury-
) +
pteron
"feather, wing" (see
pterodactyl
); so called from their swimming appendages.
[eurypterid etymology, eurypterid origin, 英语词源]