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Diapsida

Definitions of Diapsida
  1. noun
    used in former classifications to include all living reptiles except turtles; superseded by the two subclasses Lepidosauria and Archosauria
    synonyms: subclass Diapsida
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    type of:
    reptile, reptilian
    any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct forms
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