Dictionary

eurypterid

noun eu·ryp·ter·id \y-ˈrip-tə-rəd\

Definition of EURYPTERID

:  any of an order (Eurypterida) of usually large aquatic Paleozoic arthropods resembling scorpions and related to the horseshoe crabs —called also sea scorpion
eurypterid adjective
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Illustration of EURYPTERID

Origin of EURYPTERID

ultimately from Greek eury- + pteron wing — more at feather
First Known Use: 1871

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