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Definition of Synapsid reptile
1. Noun. Extinct reptile having a single pair of lateral temporal openings in the skull.
Exact synonyms: Synapsid
Generic synonyms: Reptile, Reptilian
Specialized synonyms: Protomammal, Therapsid, Ictodosaur, Pelycosaur, Edaphosaurus, Dimetrodon
Generic synonyms: Reptile, Reptilian
Specialized synonyms: Protomammal, Therapsid, Ictodosaur, Pelycosaur, Edaphosaurus, Dimetrodon