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miasma

noun [C] (FOG)
 
 
/miˈæz.mə/ literary

Definition

an unpleasant fog that smells bad: A miasma of pollution hung in the air above Mexico City.Clouds, dew, fog and steam
(Definition of miasma noun (FOG) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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