American English

Definition of rattlesnake noun from the Oxford Advanced American Dictionary

 

rattlesnake

 noun
noun
NAmE//ˈræt̮lˌsneɪk//
 
(informal rattler
NAmE//ˈrætlər//
 
, NAmE//ˈræt̮l̩ər//
 
)
 
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a poisonous snake that makes a noise like a rattle with its tail when it is angry or afraid
See the Oxford Advanced Learner's Dictionary entry: rattlesnake