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A very large allosaurid dinosaur of the genus Allosaurus of the late Jurassic Period, having a pair of bony bumps above the eyes. Also called allosaur.

[New Latin, genus name : Greek allos, other (because the imperfectly preserved vertebrae of the first specimen to be described appeared to have an hourglass shape unlike those of other dinosaurs); see allo- + Greek sauros, lizard.]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.allosaurus - late Jurassic carnivorous dinosaurallosaurus - late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus
bird-footed dinosaur, theropod, theropod dinosaur - any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs
genus Allosaurus, genus Antrodemus - carnivorous dinosaur of North America; late Jurassic
References in periodicals archive ?
Curiously, more than 75 percent of the bones come from carnivores, primarily Allosaurus fragilis.
In the description of the specimen, it was proposed as the first robust evidence of a member of the species Allosaurus fragilis outside North America (Perez-Moreno et al.
Emily Rayfield, an earth sciences doctoral student at the school, has been studying the Allosaurus fragilis.