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English definition of “altostratus”

altostratus

noun [U]     /ˌæl.təʊˈstrɑː.təs/ US  /-toʊˈstreɪ.t̬əs/ US  /-ˈstrɑː-/ specialized
a type of stratus (= a flat, grey cloud) formed in thin layers and found at medium height, above the level of stratus → Compare cirrostratus, nimbostratusClouds, dew, fog and steam
(Definition of altostratus noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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