allosaurus

World English Dictionary
allosaur or allosaurus (ˈæləˌsɔː, ˌæləˈsɔːrəs)
 
n
any large carnivorous bipedal dinosaur of the genus Antrodemus (formerly Allosaurus), common in North America in late Jurassic times: suborder Theropoda (theropods)
 
[C19: from allo- + -saur]
 
allosaurus or allosaurus
 
n
 
[C19: from allo- + -saur]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
allosaurus (āl'ə-sôr'əs) or allosaur   (āl'ə-sôr'əs)  Pronunciation Key 
Any of various carnivorous dinosaurs of the genus Allosaurus of the late Jurassic and early Cretaceous Periods. Allosaurs were similar to but smaller than tyrannosaurs.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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