variants or less commonly T-Rex
plural T. rexes also T-Rexes
: tyrannosaurus rex
Though no one can actually time a running dinosaur with a stopwatch, scientists still have some idea of how fast T. rex and his companions ran.Lilian T. Hoffecker
We don't know if T. rex hunted alone or in packs, if it pursued live prey or merely scavenged.Discover Magazine
Spielberg's dinosaurs had teeth prominently and terrifyingly on constant display, much like a modern crocodile. [Auburn University professor Thomas] Cullen and his team, however, have shown instead that the T-Rex … had lips that covered their teeth much like a modern monitor lizard.John West
T. rexes were among the largest meat-eaters on Earth during their reign … 144 million years ago. They had to eat a lot, and often, to support their enormous bodies.John Johnson Jr.

Examples of T. rex in a Sentence

Recent Examples on the Web Theropods were a group of bipedal, often carnivorous creatures that includes T. rex and all modern birds. Isaac Schultz / Gizmodo, Quartz, 28 Mar. 2024 Lips are likely rare on the T. rexes of the popular imagination. Rivka Galchen, The New Yorker, 6 Nov. 2023 Read More: Could Spinosaurus Really Take On T. rex? Elizabeth Gamillo, Discover Magazine, 6 Mar. 2024 Over the past few years, some scientists have argued that certain fossils assigned to T. rex actually represented new species — and have faced serious pushback from other scholars. Asher Elbein, New York Times, 11 Jan. 2024 Its distinct jaw shape could mean the species ate a different diet than T. rex did. Will Sullivan, Smithsonian Magazine, 12 Jan. 2024 And the rock it was found in suggests the animal was alive much earlier than T. rex. Meghan Bartels, Scientific American, 11 Jan. 2024 From analyzing growth rings found in the femur and tibia bones, the team concluded Jane was a juvenile T. rex, as a T. rex is full-grown at around 20 years old, according to the Cleveland Museum of Natural History. Elizabeth Gamillo, Discover Magazine, 5 Jan. 2024 All of these have been argued to represent adolescent T. rex, Dr. Longrich said. Asher Elbein, New York Times, 3 Jan. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'T. rex.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

New Latin, short for Tyrannosaurus rex

First Known Use

1915, in the meaning defined above

Time Traveler
The first known use of T. rex was in 1915

Dictionary Entries Near T. rex

trews

T. rex

trey

Cite this Entry

“T. rex.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/T.%20rex. Accessed 19 Apr. 2024.

Kids Definition

T. rex

noun
Last Updated: - Updated example sentences
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