English Lexicon

Effluvium

/əˈfluːvi.əm/
nounCEFR C2 (Proficient)Top #8500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    An unpleasant or noxious odor, smell, or vapor given off by something.

    "The old basement was filled with the dank effluvium of mold and stagnant water."
  2. 2

    A slight invisible emanation or vapor, especially one considered to be harmful.

    "In medical history, diseases were once thought to be spread by the effluvium of swamps."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the Latin 'effluvium', from 'effluere' meaning 'to flow out' (combining 'ex-' out + 'fluere' to flow). It entered the English language in the mid-17th century, initially used in physics and medicine to describe invisible emanations, vapors, or exhalations, particularly those considered noxious or disease-causing.

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