xiphosuran

xiphosuran

[zif-uh-soor-uhn]
adjective
1.
belonging or pertaining to the order Xiphosura, comprising the horseshoe crabs.
noun
2.
an arthropod of the order Xiphosura; a horseshoe crab.

Origin:
1830–40; < Neo-Latin Xiphosur(a) order name (irregular < Greek xíphos sword + -oura, neuter plural of -ouros -tailed, derivative of ourá tail) + -an

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World English Dictionary
xiphosuran (ˌzɪfəˈsjʊərən)
 
n
1.  any chelicerate arthropod of the subclass Xiphosura, including the horseshoe crabs and many extinct forms
 
adj
2.  of, relating to, or belonging to the subclass Xiphosura
 
[C19: from New Latin Xiphosura, irregularly from Greek xiphos sword + oura tail]

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