A flowing out or emanation, often used to describe vapors, odors, or invisible emanations, rarely used variant of 'effluvium.'
From French 'effluve' or Latin 'effluvium' (ex- 'out' + fluere 'to flow'). This singular form is archaic and rarely used compared to 'effluvium.'
In older texts, 'effluve' described the mysterious invisible emanations from diseased people that supposedly spread plague—medieval doctors called it 'miasma' or 'effluve,' imagining disease as a flowing vapor.
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