Science Dictionary
ankylosaurus (āng'kə-lō-sôr'əs) or ankylosaur   (āng'kə-lō-sôr'əs)  Pronunciation Key 
A large, herbivorous dinosaur of the genus Ankylosaurus of the Cretaceous Period. Ankylosaurs had a squat, heavily armored body and a clubbed tail.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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