Category:Effluvium

Ef*flu"vi*um, n.; pl. Effluvia. Etym: [L., a flowing out, fr. effluere to flow out. See Effluent, a.]

Defn: 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.