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Allosaurus

Allosaurus

1 9.1
A large meat-eating dinosaur that lived in North America long ago
  • noun
  • /ˌæləˈsɔrəs/
  • Specialized
: Alosaurio
  • The Allosaurus was one of the top predators in the Late Jurassic period.

Examples

  • With the help of finite element analysis software, Emily Rayfield, an earth sciences doctoral student at Cambridge University, studies the Allosaurus fragilis, a theropod from the Jurassic period.

    Academic text (2001)
  • During the thirty years that it has been excavated by Jim Madsen of the University of Utah, the quarry has produced the remains of scores of Allosaurus individuals of different size classes.

    Academic text (1991)
  • The steel at the ankle of the Allosaurus had to be strong to support the animal at an extreme angle from only a single point.

    Academic text (1991)
  • Suddenly, their foraging is cut short by the appearance of a hungry carnivore, Allosaurus.

    Academic text (1991)
  • For example, 13-year-old India Wood of Colorado found a 150-million-year-old Allosaurus on her family's ranch in 1979.

    Academic text (2001)
  • Emily Rayfield, an earth sciences doctoral student at the school, has been studying the Allosaurus fragilis, a theropod from the Jurassic period whose fossilized remains have been found at numerous sites in the United States and Europe.

    Academic text (2001)
  • Each reconstructed dinosaur skeleton, representing the Triassic, Jurassic, and Cretaceous periods, is posed based on the latest scientific evidence, including an Allosaurus and Stegosaurus locked in fierce battle.

    Academic text (1995)
  • The Allosaurus has an unusual skull: an intricate arrangement of interlocking webs and cavities, which makes the roughly 2-foot (80-centimeter) skull surprisingly light, she said.

    Academic text (2001)
  • Paleontologists discovered the fossilized remains of an Allosaurus in North America.

  • An Allosaurus hunted large herbivorous dinosaurs for food.

Synonyms

allosaur
vsAllosaurus
1 9.9

A large meat-eating dinosaur from the late Jurassic often smaller than Tyrannosaurus rex

is the accepted scientific genus name used for North American specimens
Antrodemus
vsAllosaurus
  • Archaic
9.9

A type of meat-eating dinosaur from North America in the Late Jurassic

is the accepted modern genus name replacing that older name

Surface Forms

Allosaurus singular
Allosauruses plural

Morphology

Allosaurus = allo + saurus

A Latinized scientific compound from Greek combining forms ('allo-' + 'saurus') whose components are not productive English words for average learners, so the meaning is not usefully derivable.

Etymology

Allosaurus comes from Greek parts allos 'different' and saurus 'lizard', so its name means 'different lizard'. That's a helpful memory: it was a large, meat-eating dinosaur, and the name reminds you it was a big, unusual lizard.