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

 

tyrannosaur

 noun
noun
BrE BrE//tɪˈrænəsɔː(r)//
 
; NAmE NAmE//tɪˈrænəsɔːr//
 
; BrE BrE//taɪˈrænəsɔː(r)//
 
; NAmE NAmE//taɪˈrænəsɔːr//
 
(also tyrannosaurus
BrE BrE//tɪˌrænəˈsɔːrəs//
 
; NAmE NAmE//tɪˌrænəˈsɔːrəs//
 
)
 
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a very large dinosaur that stood on two legs, had large powerful jaws and two short front legs Word Originmodern Latin, from Greek turannos ‘tyrant’ + sauros ‘lizard’, on the pattern of dinosaur.
See the Oxford Advanced American Dictionary entry: tyrannosaur