any of a genus (Allosaurus) of huge, carnivorous saurischian dinosaurs of the Jurassic and Cretaceous periods
Origin of allosaurusModL: see allo- and -saur
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 .
Origin of allosaurusNew 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
From Ancient Greek ἄλλος (allos, “other, different”) + σαῦρος (sauros, “lizard”).