Also found in: Thesaurus.
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|Noun||1.||subclass Lepidosauria - diapsid reptiles: lizards; snakes; tuataras|
class Reptilia, Reptilia - class of cold-blooded air-breathing vertebrates with completely ossified skeleton and a body usually covered with scales or horny plates; once the dominant land animals
class - (biology) a taxonomic group containing one or more orders