Merostomata

2 definitions found

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

  Merostomata \Mer`o*stom"a*ta\, prop. n. pl. [NL., fr. Gr. me`ros
     thigh + ?, -?, mouth.] (Zool.)
     A class of Arthropoda, allied to the Crustacea. It includes
     the trilobites, {Eurypteroidea}, and {Limuloidea}. All are
     extinct except the horseshoe crabs ({Limulus}) of the last
     group. See {Limulus}.


     [1913 Webster]

From WordNet (r) 2.0 [wn]:

  Merostomata
       n : used in some classifications; includes the orders Xiphosura
           and Eurypterida [syn: {class Merostomata}]