'Effluvium' definitions:

Definition of 'effluvium'

From: WordNet
noun
A foul-smelling outflow or vapor (especially a gaseous waste)

Definition of 'Effluvium'

From: GCIDE
  • Effluvium \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. [1913 Webster]

Synonyms of 'effluvium'

From: Moby Thesaurus