effluvium

/ɪˈfluːviəm/
noun
  1. An unpleasant or harmful smell or vapor that comes out of something.
    • Scientists studied the effluvium coming from the chemical plant to check for toxins.
    • The effluvium from the garbage dump made the whole neighborhood hold their noses.
    • A strange effluvium rose from the swamp, smelling of rotten eggs and decay.
Antonyms
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