- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- any large carnivorous bipedal dinosaur of the genus Antrodemus (formerly Allosaurus), common in North America in late Jurassic times: suborder Theropoda (theropods)
Word Origin for allosaur
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
- 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.