brontosaurus

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noun bron·to·sau·rus \ˌbrän-tə-ˈsȯr-əs\
variants: or less commonly

brontosaur

play \ˈbrän-tə-ˌsȯr\

Definition of brontosaurus

  1. :  any of a genus (Apatosaurus) of very large sauropod dinosaurs of the Late Jurassic :  apatosaurus The name brontosaurus continues to be commonly used for these dinosaurs even though their former genus name (Brontosaurus) is considered invalid.

Recent Examples of brontosaurus from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'brontosaurus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of brontosaurus

New Latin, from Greek brontē thunder + sauros lizard; akin to Greek bremein to roar


BRONTOSAURUS Defined for English Language Learners

brontosaurus

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noun

Definition of brontosaurus for English Language Learners

  • : a very large dinosaur that had a long neck and tail


BRONTOSAURUS Defined for Kids

brontosaurus

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noun bron·to·sau·rus \ˌbrän-tə-ˈsȯr-əs\

Definition of brontosaurus for Students

  1. :  a huge plant-eating dinosaur with a long neck and tail and four thick legs

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