synapsida
English Thesaurus
1. extinct reptiles of the Permian to Jurassic considered ancestral to mammals (noun.animal)
| hypernym | : | class, |
| definition | : | (biology) a taxonomic group containing one or more orders (noun.group) |
| member holonym | : | order therapsida, therapsida, |
| definition | : | extinct mammal-like reptiles found inhabiting all continents from the mid Permian to late Triassic (noun.animal) |
| member meronym | : | class reptilia, reptilia, |
| definition | : | 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 (noun.animal) |
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