: 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

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As paleontologists explain in a study published in the journal Gondwana Research, the massive ichthyosaur who made a meal of the pterosaur soon became a snack for a gigantic apex predator that swam the inland Eromanga Sea over 100 million years ago. — Andrew Paul, Popular Science, 29 July 2026 Nagatitan lived alongside various other dinosaurs as well as flying reptiles called pterosaurs. — Reuters, NBC news, 15 May 2026 Flying reptiles called pterosaurs would've also eaten fish from the river. — Michelle Del Rey, USA Today, 15 May 2026 Towering over walkways and soaring overhead, a life-size cast of prehistoric giants will take over the grounds — from a pterosaur perched for flight to a sprawling brontosaurus and a fearsome Tyrannosaurus rex. — Eva Remijan-Toba, Chicago Tribune, 24 Mar. 2026 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 27 Sep. 2026.

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