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[bron-tuh-sawr-uh s] /ˌbrɒn təˈsɔr əs/
noun, plural brontosauruses, brontosauri
[bron-tuh-sawr-ahy] /ˌbrɒn təˈsɔr aɪ/ (Show IPA)
Origin of brontosaurus
< New Latin (1879), equivalent to Greek bronto- (combining form of brontḗ thunder) + saûros -saurus Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for brontosauri


any very large herbivorous quadrupedal dinosaur of the genus Apatosaurus, common in North America during Jurassic times, having a long neck and long tail: suborder Sauropoda (sauropods)
Word Origin
C19: from New Latin, from Greek brontē thunder + sauros lizard
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for brontosauri



1879, Modern Latin, from Greek bronte "thunder" (perhaps from PIE imitative root *bhrem- "to growl") + -saurus. Brontes was the name of one of the Cyclopes in Greek mythology.

Online Etymology Dictionary, © 2010 Douglas Harper
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brontosauri in Culture
Brontosaurus [(bron-tuh-sawr-uhs)]

A large herbivorous (see herbivore) dinosaur, perhaps the most familiar of the dinosaurs. The scientific name has recently been changed to Apatosaurus, but Brontosaurus is still used popularly. The word is from the Greek, meaning “thunder lizard.”

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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