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Definition of Plesiosauria
1. Noun. Any of the plesiosaurs.
Exact synonyms: Suborder Plesiosauria
Generic synonyms: Animal Order
Group relationships: Order Sauropterygia, Sauropterygia
Member holonyms: Genus Plesiosaurus
Generic synonyms: Animal Order
Group relationships: Order Sauropterygia, Sauropterygia
Member holonyms: Genus Plesiosaurus
Definition of Plesiosauria
1. n. pl. An extinct order of Mesozoic marine reptiles including the genera Plesiosaurus, and allied forms; -- called also Sauropterygia.
Medical Definition of Plesiosauria
1.