ty·​ran·​no·​saur | \ tə-ˈra-nə-ˌsȯr How to pronounce tyrannosaur (audio) , tī-\

Definition of tyrannosaur

1 : a massive North American tyrannosaurid (Tyrannosaurus rex)

Examples of tyrannosaur in a Sentence

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Our cover story this month, from editor Eric Betz, takes you through the new world of the tyrannosaurs. Discover Magazine, "Table of Contents April 2019," 16 June 2019 Titus thinks these tyrannosaurs died together some 76 million years ago during the Cretaceous Period. Eric Betz, Discover Magazine, "Tyrannosaurus Rex: Scary. Smart. Social?," 12 Apr. 2019 Lunch date: Being an apex predator doesn’t mean that the tyrannosaurs were only hunting down and eating live prey. Grace Wong, chicagotribune.com, "What do a sommelier, a Bears lineman and a penguin eat for lunch?," 26 Apr. 2018 Further work will determine whether the team actually has a T. rex on their hands, or possibly a Nanotyrannus, a tiny genus of tyrannosaur that's a matter of scientific debate. Sarah Gibbens, National Geographic, "Is This Fossil a Baby T. Rex or a Controversial ‘Nano’ Dinosaur?," 30 Mar. 2018 Over the course of February, the tyrannosaur will be deconstructed, spirited upstairs to its new home in the museum's former 3-D theater on the second floor and then remounted in place for an unveiling in early 2019. Steve Johnson And Phil Geib, chicagotribune.com, "The dismantling of Sue the T. rex at the Field Museum," 3 Feb. 2018 Since there is ample evidence to suggest that earlier tryannosaurs had feathers, the study’s conclusions would mean that tyrannosaurs evolved a feathery coat, only to eventually lose it. Brigit Katz, Smithsonian, "T. Rex Was Likely Covered in Scales, Not Feathers," 8 June 2017 Ever since, scientists regularly included the fossil, which was clearly a tyrannosaur, in their analyses of the group. National Geographic, "This Is Our Best Look Yet at a Tyrannosaur’s Face," 30 Mar. 2017 A new tyrannosaur with evidence with evidence for anagenesis and crocodile-like facial sensory system. Darren Naish, Scientific American Blog Network, "The Sensitive Face of a Big Predatory Dinosaur," 16 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tyrannosaur.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tyrannosaur

1924, in the meaning defined at sense 1

History and Etymology for tyrannosaur

New Latin Tyrannosaurus, from Greek tyrannos tyrant + sauros lizard

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Last Updated

10 Jul 2019

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The first known use of tyrannosaur was in 1924

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More Definitions for tyrannosaur


ty·​ran·​no·​saur | \ tə-ˈra-nə-ˌsȯr How to pronounce tyrannosaur (audio) , tī-\

Kids Definition of tyrannosaur

: a very large North American meat-eating dinosaur that had small forelegs and walked on its hind legs

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Britannica.com: Encyclopedia article about tyrannosaur

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a usually brief trip or an expedition

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