Source : Webster's Revised Unabridged Dictionary (1913)

Megalosaur \Meg"a*lo*saur`\, Megalosaurus \Meg`a*lo*sau"rus\, n.
   [NL. megalosaurus, fr. Gr. ?, ?, great + ? lizard: cf. F.
   m['e]galosaure.] (Paleon.)
   A gigantic carnivorous dinosaur, whose fossil remains have
   been found in England and elsewhere.

Source : WordNet®

megalosaur
     n : gigantic carnivorous bipedal dinosaur of the Jurassic or
         early Cretaceous in Europe [syn: {megalosaurus}]