Definition of brontosaurus noun from the Oxford Advanced Learner's Dictionary

 

brontosaurus

 noun
noun
BrE BrE//ˌbrɒntəˈsɔːrəs//
 
; NAmE NAmE//ˌbrɑːntəˈsɔːrəs//
 
 
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= apatosaurus Word Originmodern Latin (former genus name), from Greek brontē ‘thunder’ + sauros ‘lizard’.
See the Oxford Advanced American Dictionary entry: brontosaurus

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