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cirrostratus

noun [U]
 
 
/ˌsɪr.əʊˈstrɑː.təs/ US  /-oʊˈstreɪ.t̬əs/ specialized

Definition

a type of flat whitish cloud formed in a very thin layer and seen high in the sky → Compare altostratus, nimbostratusClouds, dew, fog and steam
(Definition of cirrostratus noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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