Definition of cirrostratus noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌsɪrəʊˈstrɑːtəs//
; NAmE NAmE//ˌsɪroʊˈstrɑːtəs//
; BrE BrE//ˌsɪrəʊˈstreɪtəs//
; NAmE NAmE//ˌsɪroʊˈstreɪtəs//
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a thin layer of fairly flat clouds very high up in the sky Word Origincirro- from Latin cirrus ‘curl, fringe’.
See the Oxford Advanced American Dictionary entry: cirrostratus