Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of hylaeosaur is as below...

Hylaeosaur :: Hylaeosaur (n.) Alt. of Hylaeosauru.

Hyleosaur :: Hyleosaur (n.) Same as Hylaeosaur.

Hylaeosaurus :: Hylaeosaurus (n.) 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..

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