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

 

allosaurus

 noun
noun
BrE BrE//ˌæləˈsɔːrəs//
 
; NAmE NAmE//ˌæləˈsɔːrəs//
 
 
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a type of large dinosaur Word Originmodern Latin, from Greek allos ‘other’ + sauros ‘lizard’.
See the Oxford Advanced American Dictionary entry: allosaurus