sauropterygia

English Thesaurus

1. extinct marine reptiles: plesiosaurs; nothosaurs (noun.animal)

hypernym	:	animal order,
definition	:	the order of animals (noun.animal)

member holonym	:	plesiosauria, suborder plesiosauria,
definition	:	any of the plesiosaurs (noun.animal)

member holonym	:	nothosauria, suborder nothosauria,
definition	:	a suborder of Sauropterygia (noun.animal)

member meronym	:	archosauria, subclass archosauria,
definition	:	a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts (noun.animal)