"miasm" in the noun sense
1. miasma, miasm
an unwholesome atmosphere
"the novel spun a miasma of death and decay"
2. miasma, miasm
unhealthy vapors rising from the ground or other sources
"the miasma of the marshes"
"a miasma of cigar smoke"
Source: WordNet® (An amazing lexical database of English)
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