Meaning of xiphosuran

xiph•o•su•ran

Pronunciation: (zif"u-soor'un), [key]
— adj.
  1. belonging or pertaining to the order Xiphosura, comprising the horseshoe crabs.
—n.
  1. an arthropod of the order Xiphosura; a horseshoe crab.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.