archosaur

noun

ar·​cho·​saur ˈär-kə-ˌsȯr 

: any of a subclass (Archosauria) of reptiles comprising the dinosaurs, pterosaurs, and crocodilians

archosaurian

ˌär-kə-ˈsȯr-ē-ən 

adjective or noun

Examples of archosaur in a Sentence

Recent Examples on the Web

The discovery helps fill an important gap in our understanding of the evolution of archosauriformes, a group of reptiles that gave rise to the archosaurs. — The Conversation, Fortune, 10 Aug. 2026

There may also be tracks of predatory dinosaurs and archosaurs, the ancestors of crocodiles, the press release said. — CBS News, 16 Dec. 2025

The discovery came with the find of Ixalerpeton, a small lagerpetid archosaur and a close relative of pterosaurs, unearthed from 233-million-year-old rocks in Brazil. — Mrigakshi Dixit, Interesting Engineering, 27 Nov. 2025

During the Triassic, a broad group known as the archosaurs evolved and eventually split into two major lineages. — Sean Mowbray, Discover Magazine, 1 Aug. 2024

Birds and crocodilians are archosaurs, the living relatives of non-avian dinosaurs and pterosaurs. — Jeanne Timmons, Ars Technica, 26 July 2023

Word History

Etymology

New Latin Archosauria, from Greek archōn + sauros lizard

First Known Use

1933, in the meaning defined above

Rhymes for archosaur

• albacore
• alongshore
• antiwar
• anymore
• carnivore
• commodore
• dinosaur
• evermore
• furthermore
• guarantor
• herbivore
• heretofore