| Miasma (n.) Infectious particles or germs floating in the air; air made noxious by the presence of such particles or germs; noxious effluvia; malaria. Thesaurus Entries BO, afterdamp, bad breath, bad smell, blackdamp, body odor, breath, chokedamp, cloud, coal gas, damp, effluvium, exhalation, exhaust, exhaust gas, fetid air, fetidity, fetidness, fetor, firedamp, flatus, fluid, foul breath, foul odor, frowst, fume, graveolence, halitosis, malaria, malodor, mephitis, nidor, noxious stench, offensive odor, puff of smoke, reek, reeking, rotten smell, smoke, smudge, steam, stench, stench of decay, stink, vapor, volatile, water vapor |