EFFLUVIUM
effluvium
(noun) a foul-smelling outflow or vapor (especially a gaseous waste)
Source: WordNet® 3.1
Etymology
Noun
effluvium (plural effluvia or effluviums)
A gaseous or vaporous emission, especially a foul-smelling one.
A condition causing the shedding of hair.
Source: Wiktionary
Ef*flu"vi*um, n.; pl. Effluvia. Etym: [L., a flowing out, fr.
effluere to flow out. See Effluent, a.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition