allosaur

Thân thiện

A paleontologist carefully uncovers an allosaur fossil at a dig site.

Definition

Noun 1. A large carnivorous dinosaur: An allosaur is a type of large, bipedal, meat-eating dinosaur that lived during the Late Jurassic period. It is known for its powerful jaws, sharp teeth, and is often compared to the later Tyrannosaurus rex, though it is generally somewhat smaller and had distinctive features like crests in front of its eyes.

Usage Examples

• Noun:
  • The museum's centerpiece is a complete skeleton of an allosaur.
  • Paleontologists discovered new allosaur fossils in the Morrison Formation.
  • The allosaur was one of the top predators of its ecosystem.

Advanced Usage

• "Allosaur" vs. "Tyrannosaurus": While both are large theropods, "allosaur" specifically refers to the genus from the Jurassic, characterized by a lighter build and three-fingered hands. "Tyrannosaurus" refers to the genus from the much later Cretaceous period, known for its massive skull and two-fingered hands.
  • The film depicted an allosaur, but its size was exaggerated to rival a Tyrannosaurus.

Variants and Related Words

• Allosaurus (n): The scientific genus name for the allosaur. Often used interchangeably in general contexts.
  • The species is formally known as Allosaurus fragilis.
• Theropod (n): The broader dinosaur group to which allosaurs belong, characterized by hollow bones and three-toed limbs.
  • Allosaurs, like raptors and T. rex, are classified as theropods.

Synonyms

• Predatory dinosaur: A general term for meat-eating dinosaurs.
• Carnivorous theropod: A more specific scientific description.

Related Phrases / Terms

• Apex predator: The allosaur is considered an apex predator of the Late Jurassic.
• Morrison Formation: The primary geological formation in North America where allosaur fossils are commonly found.

Học thuật

Noun

1. late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus

Từ đồng nghĩa

• allosaurus