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 immediately sparked debate over the evolutionary pathways of miniaturization and morphological convergence, challenging assumptions about how small archosaurs could become and how to interpret highly specialized skull forms in the fossil record. —Scott Travers, Forbes.com, 29 Apr. 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

At the end of the Triassic period, small-sized dinosaurs roamed Earth alongside other groups of archosaurs—that is, until a widespread extinction event cleared the way for dinos to put on some serious size. —Darren Orf, Popular Mechanics, 16 May 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
• blastopore
• carnivore
• commodore
• dinosaur
• evermore
• furthermore
• guarantor
• herbivore