Share this entry

elasmosaur Syllabification: e·las·mo·saur
Pronunciation: /əˈlazməˌsôr/
(also elasmosaurusəˌlazməˈsôrəs)

Definition of elasmosaur in English:


A Cretaceous plesiosaur with a long neck shaped like that of a swan.
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'.



Example sentences
  • Several associated series of elasmosaurian cervical vertebrae were used to measure ranges of potential flexion.
  • The cervical vertebrae are very short, suggesting pliosaurian relationships, whereas the scapulae and coracoids seem to be elasmosaurian.

Definition of elasmosaur in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day coiffeur
Pronunciation: kwɑːˈfəː
a hairdresser