xiph·o·su·ran (z f  -s r n)n. An arthropod of the order Xiphosura, which includes the horseshoe crab and many extinct forms. adj. Of or belonging to the order Xiphosura. [From New Latin Xiphos  ra, order name : Greek xiphos, sword + Greek our , tail; see ors- in Indo-European roots.] |
xiphosuran [ˌzɪfəˈsjʊərən]
n
(Life Sciences & Allied Applications / Animals) any chelicerate arthropod of the subclass Xiphosura, including the horseshoe crabs and many extinct forms
adj
(Life Sciences & Allied Applications / Animals) of, relating to, or belonging to the subclass Xiphosura
[from New Latin Xiphosura, irregularly from Greek xiphos sword + oura tail]
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