effluvium
Concise Oxford English Dictionary © 2008 Oxford University Press:
effluvium /ɪˈfluːvɪəm/
▶noun (pl. effluvia /-vɪə/) an unpleasant or harmful odour or discharge.
– origin C17: from L., from effluere ‘flow out’.
'effluvium' also found in these Oxford entries:

