plesiosaur

noun

ple·​si·​o·​saur ˈplē-sē-ə-ˌsȯr How to pronounce plesiosaur (audio)
-zē-
: 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
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This ancient marine environment had produced fossils of plesiosaurs and dolphin-like ichthyosaurs in other locations, so the researchers expected that any new find was going to be something similar. Jeanne Timmons, Ars Technica, 25 Jan. 2023 Originally thought to be saltwater animals only, recent research indicates that some plesiosaurs could live in freshwater environments (like Loch Ness). Stephen C. George, Discover Magazine, 23 Jan. 2024 This fearsome creature was not the largest animal of the tropical Cretaceous oceans: It was outclassed by several species of enormous long-necked plesiosaurs, such as the 26-foot-long Callawayasaurus colombiensis. Santiago Flórez, Smithsonian Magazine, 6 Feb. 2024 This has only added to the conviction that Nessie is either some surviving example of plesiosaur or a heretofore unknown species descended from those early dinosaurs. Stephen C. George, Discover Magazine, 23 Jan. 2024 See all Example Sentences for plesiosaur 

Word History

Etymology

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

First Known Use

1839, in the meaning defined above

Time Traveler
The first known use of plesiosaur was in 1839

Dictionary Entries Near plesiosaur

Cite this Entry

“Plesiosaur.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/plesiosaur. Accessed 21 Nov. 2024.

Kids Definition

plesiosaur

noun
ple·​sio·​saur
ˈplē-sē-ə-ˌsȯ(ə)r,
-zē-
: any of a group of large Mesozoic marine reptiles with flattened bodies and limbs changed into paddles

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