[ ə-păt′ə-sôrəs ]

  1. 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.

Words Nearby apatosaurus

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

How to use apatosaurus in a sentence

  • This was about thirty feet long, and is known as apatosaurus grandis.

    Extinct Monsters | H. N. Hutchinson