EFFLUVIUM

effluvium. Effluvium, n. an emanation, vapor, smell

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Ef‐flu″vi‐um (?), n.; pl. Effluvia (#). [[L., a flowing out, fr. effluere to flow out. See Effluent, a.]] Subtile or invisible emanation; exhalation perceived by the sense of smell; especially, noisome or noxious exhalation; as, the effluvium from diseased or putrefying bodies, or from ill drainage.