Also found in: Thesaurus.
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|Noun||1.||order Therapsida - extinct mammal-like reptiles found inhabiting all continents from the mid Permian to late Triassic|
animal order - the order of animals
subclass Synapsida, Synapsida - extinct reptiles of the Permian to Jurassic considered ancestral to mammals
Cynodontia, division Cynodontia - a division of the order Therapsida from the Triassic period comprising small carnivorous tetrapod reptiles often with mammal-like teeth