• synonyms


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

Examples from the Web for apatosaurus

Historical Examples of apatosaurus

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

    Extinct Monsters

    H. N. Hutchinson