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[al-uh-sawr] /ˈæl əˌsɔr/
a carnivorous dinosaur of the genus Antrodemus (formerly Allosaurus), from the late Jurassic Period of North America, that was about 30 feet (9 meters) long.
Origin of allosaur
< New Latin Allosaurus (1877). See allo-, -saur Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for allosaur


any large carnivorous bipedal dinosaur of the genus Antrodemus (formerly Allosaurus), common in North America in late Jurassic times: suborder Theropoda (theropods)
Word Origin
C19: from allo- + -saur
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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allosaur in Science
allosaurus (āl'ə-sôr'əs) or allosaur
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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