Dictionary

horseshoe crab

noun

Definition of HORSESHOE CRAB

:  any of several closely related marine arthropods (order Xiphosura and class Merostomata) with a broad crescentic cephalothorax, six pairs of legs, and a spikelike tail; especially :  one (Limulus polyphemus) of coastal waters from Maine to the Yucatán Peninsula —called also king crab

First Known Use of HORSESHOE CRAB

1797

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