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brown cloud

Syllabification: brown cloud

Entry from US English dictionary

Definition of brown cloud in English:

noun

A visible pall of air pollutants that persists over a city or other area: the Asian brown cloud throughout the day, air shifts in the valley cause variances in the brown cloud

Definition of brown cloud in:

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Word of the day prepotent
Pronunciation: prɪˈpəʊt(ə)nt
adjective
greater than others in power or influence