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glaciation

noun [U]
 
 
/ˌɡleɪ.siˈeɪ.ʃən/

Definition

the forming, existence, or movement of glaciers over the surface of the Earth: This landscape shows many clear features of glaciation.Snow and iceCold
(Definition of glaciation noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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