any of a genus (Allosaurus) of huge, carnivorous saurischian dinosaurs of the Jurassic and Cretaceous periods
Origin of allosaurusModL: see allo- and amp; -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”).