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

Illustration of EURYPTERID

Origin of EURYPTERID

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

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