effluvium

[ih-floo-vee-uhm]
noun, plural effluvia [ih-floo-vee-uh] , effluviums.
a slight or invisible exhalation or vapor, especially one that is disagreeable or noxious.

Origin:
1640–50; < Latin, equivalent to ef- ef- + fluv-, base of fluere to flow (see effluent) + -ium -ium

effluvial, adjective
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World English Dictionary
effluvium (ɛˈfluːvɪəm)
 
n , pl -via, -viums
an unpleasant smell or exhalation, as of gaseous waste or decaying matter
 
[C17: from Latin: a flowing out; see effluent]
 
ef'fluvial
 
adj

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Etymonline
Word Origin & History

effluvium
1640s, from L. effluvium "a flowing out," from effluere (see effluence).

effluvia
Latin plural of effluvium.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

effluvium ef·flu·vi·um (ĭ-flōō'vē-əm)
n. pl. ef·flu·vi·ums or ef·flu·vi·a (-vē-ə)

  1. A shedding, especially of hair.

  2. An exhalation, especially one of bad odor or injurious influence. No longer in technical use.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The danger here is that it must be interesting effluvia.
At this point the book begins to overflow with not-quite-as-cute effluvia.
Industrial sewage and effluvia, especially from the slaughterhouses, made the river unsafe and extremely unpleasant at low tide.
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