T. rex

/ˈtiː ɹɛks/

A form of tyrannosaurus rex — A giant carnivorous theropod dinosaur from the Cretaceous period.

Meanings

T. rex1

nounT. rex (plural T. rexes)

plural T. rexes · alternative informal nonstandard T. Rex · alternative informal nonstandard T-rex · alternative informal nonstandard T-Rex · alternative informal nonstandard T.-rex · alternative informal nonstandard T.-Rex

  1. abbreviationAbbreviation of Tyrannosaurus rex.

    Juvenile T. rexes were light and agile before they leveled up into the adults we’re more familiar with. (The physical discrepancies between younger and older T. rexes can be so vast that experts have argued over whether certain specimens are different species altogether, rather than different ages.)

    2021 February 25, Cara Giaimo, “The Outsized Influence of Teen T. Rex and Other Young Dinosaurs”, in The New York Times, New York, N.Y.: The New York Times Company, →ISSN, →OCLC

T. Rex2

nounT. Rex (plural T. Rexes)

plural T. Rexes

  1. alternativeinformalnonstandardAlternative spelling of T. rex.

    I mean, not only are they found on Australia alone, like some kind of mutant evolutionary strain—they have the eyes of deer and the useless paws of a T. Rex.

    2004, Jodi Picoult, My Sister's Keeper, page 374
    2 more examples

    In this body of water lived a predator even bigger than she, the fifty-foot-long crocodilian known as Deinosuchus, the only animal capable of killing a T. Rex unwise enough to venture into the wrong body of water in pursuit of prey.

    2007, Douglas Preston, Tyrannosaur Canyon, page 105

    [I]f Terra introduced some T. Rexes from Cocos island in Jurassic Park, that would be considered kind of “unethical,” so might as well do it through government.

    2008, Victoria Minnich, Question Reality: An Investigation of Self-Humans-Environment, Part 2, page 454

Synonyms & antonyms

Cite this entry
APA

T. rex. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/T.%20rex

MLA

“T. rex.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/T.%20rex. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “T. rex,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/T.%20rex.

Source: T. rex on Wiktionary, CC BY-SA 4.0.