Hylæosaur

{ Hy″læ‐o‐saur′ (?), ‖Hy′læ‐o‐sau″rus (?), } n. [NL. hylaeosaurus, fr. Gr. � belonging to a forest (fr. � wood) + � a lizard.] (Paleon.) A large Wealden dinosaur from the Tilgate Forest, England. It was about twenty feet long, protected by bony plates in the skin, and armed with spines.