[dahy-non-i-kuh s]


a small bipedal dinosaur, genus Deinonychus, of the Cretaceous Period, characterized by having a large, curved claw on each hind foot.

Origin of deinonychus

< New Latin (1969) < Greek dein(ós) fearful, terrible (see dinosaur) + -onychos -clawed, adj. derivative of ónyx claw, nail; see onyx Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019