Diapsida

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The Century Dictionary and Cyclopedia
  • A subclass of Reptilia which contains those forms with (primarily) two temporal arches, a relatively small squamosal, large quadrate, and coracoid and procoracoid early coalescing, or the procoracoid degenerate: contrasted with *Synapsida.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • n. used in former classifications to include all living reptiles except turtles; superseded by the two subclasses Lepidosauria and Archosauria
  • Hypernym
    Words that are more generic or abstract
    reptile    reptilian   
    Unknown
    diopside