brontosaurus

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

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

Full Definition of BRONTOSAURUS

: any of a genus (Apatosaurus syn. Brontosaurus) of large sauropod dinosaurs of the Jurassic —called also apatosaurus

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bron·to·sau·rus also bron·to·saur \ˈbrän-tə-ˌsȯr\

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

First Known Use: 1892

BRONTOSAURUS Defined for Kids

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

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

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