tyrannosaur

noun

ty·​ran·​no·​saur tə-ˈra-nə-ˌsȯr 

tī-

plural tyrannosaurs

1

: a massive North American tyrannosaurid dinosaur (Tyrannosaurus rex) : tyrannosaurus rex

2

: tyrannosaurid

Examples of tyrannosaur in a Sentence

Recent Examples on the Web

While more fossil samples will help researchers further illuminate tyrannosaur evolution, the study also highlights the importance of revisiting old findings. —Sara Hashemi, Smithsonian Magazine, 13 June 2025

One more migration happened as tyrannosaurs continued to evolve, and a gigantic tyrannosaur species crossed back into North America 68 million years ago, resulting in Tyrannosaurus rex, Zelenitsky said. —Ashley Strickland, CNN Money, 11 June 2025

Rather than being just one main lineage of tyrannosaurs before T. rex, at least three roamed the Earth. —Riley Black, Smithsonian Magazine, 16 Dec. 2024

Predators everywhere Finding traces of tyrannosaurs in this area is particularly notable. —Laura Baisas, Popular Science, 5 Dec. 2024

Word History

Etymology

New Latin Tyrannosaurus, from Greek tyrannos tyrant + sauros lizard

First Known Use

1905, in the meaning defined at sense 1

Rhymes for tyrannosaur

• conquistador
• forevermore
• hereinbefore
• kinetochore
• kwashiorkor
• abhor
• abor
• adore
• afore
• ardour
• ashore
• backdoor

Kids Definition

tyrannosaur

noun

ty·​ran·​no·​saur tə-ˈran-ə-ˌsȯ(ə)r 

tī-

: a very large North American flesh-eating dinosaur of the Cretaceous period that had small forelegs and walked on its hind legs