order_xiphosura
1. [ noun ] (biology,zoology) horseshoe crabs and extinct forms
Synonyms: Xiphosura
Related terms: animal_order Merostomata Limulidae
Similar spelling:   order_Thysanura
  order_Siphonophora
  order_Anoplura
  order_Anostraca
  order_Notostraca
  order_Rosales
  order_Pterosauria
  order_Diptera
  order_Isopoda
  order_Ostracodermi
  order_Trichoptera
  order_Siphonaptera
  order_Ornithischia
  order_Embioptera
  order_Charales
  order_Phasmida
  order_Piperales
  order_Protura
  order_Pholidota
  order_Isoptera
  order_Hyracoidea
  order_Therapsida
  order_Cydippea
  order_Phasmatodea