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• allosaurus
  allosaurus

  noun

  allosaur.
• Allosaurus
  Allosaurus

  noun

  the genus Antrodemus.

allosaurus

¹ American  

[al-uh-sawr-uhs] / ˌæl əˈsɔr əs /

noun

allosauruses plural

1. allosaur.

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Allosaurus ² American  

[al-uh-sawr-uhs] / ˌæl əˈsɔr əs /

noun

1. Older Use. the genus Antrodemus.

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allosaurus Scientific  

/ ăl′ə-sôr′əs /

1. Any of various carnivorous dinosaurs of the genus Allosaurus of the late Jurassic and early Cretaceous Periods. Allosaurs were similar to but smaller than tyrannosaurs.

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Other Word Forms

Derived Forms

• allosauroid
  adjective

Inflected Forms

Nouns

• allosauruses
  plural

Example Sentences

See Examples For:

allosaurus Allosaurus allosauruses

I still remember being wowed by a stegosaurus trying to fend off an allosaurus and being sad about a T. rex that died trying to protect her babies.

From Los Angeles Times ● May 15, 2025

“Recent papers about allosaurus cannibalism are pretty interesting because it means, I think, they did not care if they were scavenging sauropods or anything, even other allosauruses, they were fine with it,” he said.

From Salon ● Nov. 2, 2023

Ms. Walter also appeared on “Law & Order,” “Touched by an Angel,” “One Life to Live,” “Murder, She Wrote,” “The Love Boat” and “Mannix” and voiced an anthropomorphic allosaurus on the puppet sitcom “Dinosaurs.”

From Washington Post ● Mar. 25, 2021

Gualicho shinyae belongs to a different type of dinosaurs called allosaurus, which scientists previously saw with strong, full-sized arms.

From Time ● Jul. 14, 2016

Another allosaurus, whining with eagerness, actually clambered up the back of an assailed giant only to fall back under the blast of a retortii mounted in the howdah.

From Astounding Stories, February, 1931 by Bates, Harry

In terms of fossils, the Stegosaurus has around 144 bone elements; the adult Allosaurus has about 143, with the juvenile version having 135.

From BBC ● Dec. 12, 2024

The researchers said several well-known Yale Peabody Museum fossils were pivotal in the work, including Allosaurus, the giant Jurassic predator discovered by O.C.

From Science Daily ● Nov. 20, 2024

Paleontologists have found these air sacs in flying reptiles called pterosaurs, in theropod dinosaurs such as Allosaurus, and in long-necked dinosaurs, including Diplodocus.

From Scientific American ● Mar. 31, 2023

In the original paper, the researchers compared the variation between individual Tyrannosaurus specimens with the variation found between several Allosaurus skeletons.

From New York Times ● Jul. 25, 2022

As compared with its predecessor Allosaurus, the Tyrannosaurus is much more massively proportioned throughout.

From Dinosaurs With Special Reference to the American Museum Collections by Osborn, Henry Fairfield

“Some of these dinosaurs were the largest dinosaurs that ever lived. Just based on the calories alone, one dead sauropod would have enough calories to feed 20 or 30 allosauruses for several months.”

From Salon ● Nov. 2, 2023

“Recent papers about allosaurus cannibalism are pretty interesting because it means, I think, they did not care if they were scavenging sauropods or anything, even other allosauruses, they were fine with it,” he said.

From Salon ● Nov. 2, 2023

Beneath Utah’s surface, there’s a rich cache of dinosaur fossils, revealing details about prehistoric animals such as carnivorous allosauruses and spine-backed stegosauruses.

From National Geographic ● Oct. 19, 2023