[ ə-păt′ə-sôr′əs ]
A very large sauropod dinosaur of the genus Apatosaurus (or Brontosaurus) of the late Jurassic Period. Apatosaurs had a long neck and tail and a relatively small head. See Note at brontosaurus.
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Words nearby apatosaurus
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Example sentences from the Web for apatosaurus
This was about thirty feet long, and is known as Apatosaurus grandis.Extinct Monsters|H. N. Hutchinson