EFFLUVIUM Meaning of EFFLUVIUM in English [ ɪ'flu:vɪəm ]■ noun ( plural effluvia -vɪə ) an unpleasant or harmful odour or discharge.OriginC17: from L., from effluere 'flow out'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004