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  1  definition  found 
 
  From  WordNet  r  1.6  [wn]: 
 
  Archosauria 
  n  :  a  large  subclass  of  diapsid  reptiles  including:  crocodiles; 
  alligators;  dinosaurs;  pterosaurs;  plesiosaurs; 
  ichthyosaurs;  thecodonts  [syn:  {Archosauria},  {subclass 
  Archosauria}] 

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