Definition of deinonychus in US English:



  • A dromaeosaurid dinosaur of the mid Cretaceous period, growing up to 11 feet (3.3 m) in length.

    Genus Deinonychus, family Dromaeosauridae, suborder Theropoda

    • ‘You can see feathered models of deinonychus, with a therizinosaurus in the background.’
    • ‘Deinonychus antirrhopus is one of the dinosaur species represented in Dinosaur Hall at the Academy of Natural Sciences.’
    • ‘A huge curved claw on each foot made Deinonychus a small but particularly deadly dinosaur of the Cretaceous Period.’
    • ‘Utahraptors were the largest species in the class where velociraptors and deinonychuses also belong.’


Modern Latin, from Greek deinos ‘terrible’ + onux, onukh- ‘claw’.