plesiosaur

English Thesaurus

1. extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous (noun.animal)

hypernym	:	archosaur, archosaurian, archosaurian reptile,
definition	:	extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts (noun.animal)

member meronym	:	genus plesiosaurus,
definition	:	a reptile genus of suborder Plesiosauria (noun.animal)