American English

Definition of erratic noun from the Oxford Advanced American Dictionary

 

erratic

 noun
noun
NAmE//ɪˈræt̮ɪk//
 
(also erratic block, erratic boulder) (geology)
 
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a large rock that is different from the rock around and was left behind when a large mass of ice melted
See the Oxford Advanced Learner's Dictionary entry: erratic

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