plesiosaur

noun
ple·si·o·saur | \ˈplē-sē-ə-ˌsȯr, -zē-\

Definition of plesiosaur 

: any of an order or suborder (Plesiosauria) of large carnivorous marine reptiles of the Mesozoic with dorsoventrally flattened bodies and limbs modified into flippers

Examples of plesiosaur in a Sentence

Recent Examples on the Web

The creature's appearance has been described as resembling a plesiosaur, an ancient sea monster that died out with the dinosaurs. Fox News, "Loch Ness Monster: This is Scotland's plan if the fabled beast is caught," 10 July 2018 Fossil evidence strongly suggests that, like nonavian dinosaurs, plesiosaurs went extinct no later than 66 million years ago. Michael Greshko, National Geographic, "Loch Ness Monster Hunters to Try DNA Search? Get the Facts.," 23 May 2018 Some cryptozoologists have argued that Nessie is a plesiosaur, a type of long-necked marine reptile that lived during the age of dinosaurs. Michael Greshko, National Geographic, "Loch Ness Monster Hunters to Try DNA Search? Get the Facts.," 23 May 2018 One of the more far-fetched theories is that Nessie is a long-necked plesiosaur that somehow survived the period when dinosaurs became extinct. Washington Post, "Legend of Loch Ness Monster will be tested with DNA samples," 23 May 2018 One of the more far-fetched theories is that Nessie is a long-necked plesiosaur that somehow survived the period when dinosaurs became extinct. Nick Perry, BostonGlobe.com, "The legend of the Loch Ness Monster will be tested with DNA samples," 23 May 2018 One of the more far-fetched theories is that Nessie is a long-necked plesiosaur that somehow survived the period when dinosaurs became extinct. Fox News, "Legend of Loch Ness Monster will be tested with DNA samples," 23 May 2018 Person said the plesiosaur was identified by its morphology. Jack Dura, The Seattle Times, "80 million-year-old remains prepped for North Dakota display," 15 Jan. 2018 The plesiosaur to be displayed will be positioned by a mosasaur specimen. Jack Dura, The Seattle Times, "80 million-year-old remains prepped for North Dakota display," 15 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'plesiosaur.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of plesiosaur

1839, in the meaning defined above

History and Etymology for plesiosaur

ultimately from Greek plēsios close (akin to Greek pelas near) + sauros lizard

Keep scrolling for more

Learn More about plesiosaur

Share plesiosaur

Statistics for plesiosaur

Look-up Popularity

Time Traveler for plesiosaur

The first known use of plesiosaur was in 1839

See more words from the same year

More from Merriam-Webster on plesiosaur

See words that rhyme with plesiosaur

Britannica.com: Encyclopedia article about plesiosaur

Comments on plesiosaur

What made you want to look up plesiosaur? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to reject or criticize sharply

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!