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elasmosaur Line breaks: elasmo|saur
Pronunciation: /ɪˈlazmə(ʊ)sɔː/

Definition of elasmosaur in English:


A Cretaceous plesiosaur with a long neck shaped like that of a swan.
  • Family Elasmosauridae, infraorder Plesiosauria: several genera, including Elasmosaurus
Example sentences
  • The remains include the bones of dinosaurs, birds, and large marine reptiles such as mosasaurs and elasmosaurs, as well as fossilized sponges, mollusks, pine cones, and diverse fish teeth.
  • Like the rest of the Plesiosauroidea, elasmosaurs had a barrel-shaped body with four paddle-shaped flippers.
  • Storrs considers this species a synonym of P. guilelmiimperatoris, while Robert Bakker asserts that it is an early elasmosaur, and transfers it to the genus Microcleidus (as M. brachypterygius).


Late 19th century: from modern Latin Elasmosaurus, from Greek elasmos 'beaten metal' + sauros 'lizard'.

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