pterosaur

noun

ptero·​saur ˈter-ə-ˌsȯr How to pronounce pterosaur (audio)
: any of an order (Pterosauria) of extinct flying reptiles existing from the Late Triassic throughout the Jurassic and most of the Cretaceous and having a featherless wing membrane extending from the side of the body along the arm to the end of the greatly elongated fourth digit

Examples of pterosaur in a Sentence

Recent Examples on the Web
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The bone was enough to identify the pterosaur as belonging to the Azhdarchidae group, the same group as Quetzalcoatlus. Irene Wright, Miami Herald, 21 Oct. 2025 Instead, Smyth believes the Lucky pterosaurs and other juvenile Pterodactylus antiquus specimens lived on the landmasses near the lagoons. Ashley Strickland, CNN Money, 19 Sep. 2025 At other sites, adult pterosaur fossils are more common, Unwin says. Mindy Weisberger, Scientific American, 5 Sep. 2025 Two baby pterosaurs that died 150 million years ago have helped scientists uncover the prehistoric event that claimed their lives and shaped their preservation. Melissa Fleur Afshar, MSNBC Newsweek, 5 Sep. 2025 See All Example Sentences for pterosaur

Word History

Etymology

New Latin Pterosauria, from Greek pteron wing + sauros lizard

First Known Use

1863, in the meaning defined above

Time Traveler
The first known use of pterosaur was in 1863

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Cite this Entry

“Pterosaur.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pterosaur. Accessed 26 Oct. 2025.

Kids Definition

pterosaur

noun
ptero·​saur ˈter-ə-ˌsȯ(ə)r How to pronounce pterosaur (audio)

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