Dictionary.com
Thesaurus.com

tyrannosaurus

British  
/ tɪˌrænəˈsɔːrəs, tɪˈrænəˌsɔː /

noun

  1. any large carnivorous bipedal dinosaur of the genus Tyrannosaurus, common in North America in upper Jurassic and Cretaceous times: suborder Theropoda (theropods)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of tyrannosaurus

C19: from New Latin, from Greek turannos tyrant + sauros lizard

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

One of the world's most complete Tyrannosaurus rex skeletons, nicknamed "Gus," was showcased Wednesday at Sotheby's auction house in New York ahead of its sale later this month.

From Barron's • Jul. 1, 2026

For decades, scientists have used these rings to reconstruct the life history of Tyrannosaurus rex.

From Science Daily • Jun. 22, 2026

Although Tyrannosaurus rex is one of the most famous dinosaurs ever discovered, some researchers have argued that not every fossil labeled as T. rex necessarily belongs to the same species.

From Science Daily • Jun. 22, 2026

Researchers say the work provides the most detailed reconstruction yet of how Tyrannosaurus grew throughout its life.

From Science Daily • Jun. 22, 2026

From the way his pockets were sticking out it looked like he had one Tyrannosaurus rex and one triceratops.

From "The Watsons Go to Birmingham" by Christopher Paul Curtis

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "tyrannosaurus" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com