Definition of deinonychosaur in US English:

deinonychosaur

noun

  • Any of various carnivorous theropod dinosaurs constituting the Cretaceous infraorder Deinonychosauria, characterized by a large recurved claw on the second toe, and many bird-like features that may have included feathers.

Origin

1960s. From Deinonychus + -o- + -saur, after scientific Latin Deinonychosauria, infraorder name.

Pronunciation

deinonychosaur

/dʌɪˈnɒnɪkəsɔː/