Eurypterida

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Eurypteroidea \Eu*ryp`te*roi"de*a\, n. pl. [NL. See
     {Eurypteroid}.] (Paleont.)
     An extinct order of Merostomata, of which the genus
     Eurypterus is the type. They are found only in Paleozoic
     rocks. [Written also {Eurypterida}.]
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  Eurypterida
       n : extinct aquatic arthropods of the Paleozoic [syn: {order
           Eurypterida}]