Definition of apatosaurus
: any of a genus (Apatosaurus of the family Diplodocidae) of very large, herbivorous, sauropod dinosaurs that lived during the Late Jurassic period and reached a length of over 65 feet (20 meters) and a height of 12 feet (3.7 meters) and are thought to have attained a weight of up to 30 tons (27 metric tons) ◆Apatosauruses were first identified as being of a separate genus (Brontosaurus) and continue to be commonly called brontosauruses or brontosaurs based on this earlier and now invalid classification.
Origin and Etymology of apatosaurus
New Latin, from Greek apatē + sauros lizard
First Known Use: 1878
APATOSAURUS Defined for Kids
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