miasma

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miasma

[mī·az′mə]
Etymology: Gk, miainein, defilement
an unwholesome, polluted atmosphere or environment, such as a marsh or swamp containing rotting organic matter. Also called miasm [mī′əzəm] .

miasma

noxious exhalations from putrescent organic matter; the basis for an early concept of the origin of epidemics.