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
Lilian T. HoffeckerWe don't know if T. rex hunted alone or in packs, if it pursued live prey or merely scavenged.—Discover Magazine
Discover MagazineSpielberg'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
John WestT. 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.
John Johnson Jr.Examples of T. rex in a Sentence
Recent Examples on the Web
In contrast to the T. rex, an adult Nanotyrannus only grew to a length of around 18 feet and weighed about 1,550 pounds.
—Andrew Paul, Popular Science, 30 Oct. 2025
The discovery has triggered a rethink of many other fossils previously identified as teenage T. rex remains, Napoli added.
—Katie Hunt, CNN Money, 30 Oct. 2025
The animal had fewer tail vertebrae and more teeth than T. rex.
—Ari Daniel, NPR, 30 Oct. 2025
Resolving this case of mistaken identity is important to understanding how T. rex grew up, said study co-author James Napoli with Stony Brook University.
—Dave Smith, Fortune, 30 Oct. 2025
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Andrew Paul, Popular Science, 30 Oct. 2025
The discovery has triggered a rethink of many other fossils previously identified as teenage T. rex remains, Napoli added.
—Katie Hunt, CNN Money, 30 Oct. 2025
The animal had fewer tail vertebrae and more teeth than T. rex.
—Ari Daniel, NPR, 30 Oct. 2025
Resolving this case of mistaken identity is important to understanding how T. rex grew up, said study co-author James Napoli with Stony Brook University.
—Dave Smith, Fortune, 30 Oct. 2025
See All Example Sentences for T. rex
Cite this Entry
“T. rex.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/T.%20rex. Accessed 14 Nov. 2025.
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T. rex
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