Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun plesiosaurus

1 sense of plesiosaurus

Sense 1
plesiosaur, plesiosaurus -- (extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous)
       => archosaur, archosaurian, archosaurian reptile -- (extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts)