cumulonimbus

noun
🔊/ˌkjuːmələʊˈnɪmbəs/
🔊/ˌkjuːmələʊˈnɪmbəs/
[uncountable] (specialist)
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  1. a high mass of thick cloud with a flat base, often seen during thunderstorms积雨云(常伴有雷阵雨)Topics Weatherc2
    Oxford Collocations DictionaryCumulonimbus is used before these nouns:
    • cloud
    See full entry