any of an order (Xiphosura) of arthropods made up of the horseshoe crabs and related extinct forms
Origin of xiphosuran; from Classical Greek xiphos, sword + oura, tail: see uro-
of or pertaining to this order
Any of various arthropods of the order Xiphosura, having a long pointed telson extending from the rear of the abdomen. The order includes the horseshoe crabs and many extinct species.
Origin of xiphosuranFrom New Latin Xiphos&umacron;ra, order name : Greek xiphos, sword + Greek oura, tail; see ors- in Indo-European roots.
- (zoology) Of or pertaining to the order Xiphosura.