This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A noxious atmosphere or influence: "The family affection, the family expectations, seemed to permeate the atmosphere . . . like a coiling miasma” ( Louis Auchincloss).

n. A poisonous atmosphere formerly thought to rise from swamps and putrid matter and cause disease.

n. A thick vaporous atmosphere or emanation: wreathed in a miasma of cigarette smoke.

n. A noxious atmosphere or influence.

n. A noxious atmosphere or emanation once thought to originate from swamps and waste to cause disease.

n. Infectious particles or germs floating in the air; air made noxious by the presence of such particles or germs; noxious effluvia; malaria.

n. The emanations or effluvia arising from the ground and floating in the atmosphere, considered to be infectious or otherwise injurious to health; noxious emanations; malaria. Also called aërial poison.

n. unhealthy vapors rising from the ground or other sources

n. an unwholesome atmosphere

"Again, exposition; but a key thing to consider: the Greek concept of miasma is at play here."

air pollution    ambience    atmosphere    ambiance   

miasmata   

malaria    exhalation    haze   

asthma    plasma   

reek    effluvia    emanations    dampness    vapors    morass    whiff    odor    stank    canker