Meaning of eurypterid

eu•ryp•ter•id

Pronunciation: (yoo-rip'tu-rid, yu-), [key]
— n.
  1. any aquatic arthropod of the extinct order Eurypterida, from the Paleozoic Era, closely related to trilobites and scorpions.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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