any of an order (Xiphosura) of arthropods made up of the horseshoe crabs and related extinct forms
Origin of xiphosuranfrom 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 Xiphosūra order name Greek xiphos sword Greek ourā tail ; see ors- in Indo-European roots.
- (zoology) Of or pertaining to the order Xiphosura.