Hylaeosaur
Hy´lae`o`saur`
| n. | 1. | (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. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.