noun, plural ef·flu·vi·a [ih-floo-vee-uh] /ɪˈflu vi ə/, ef·flu·vi·ums.
a slight or invisible exhalation or vapor, especially one that is disagreeable or noxious.
Origin of effluvium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -via (-vɪə) or -viums
an unpleasant smell or exhalation, as of gaseous waste or decaying matter
Word Origin for effluvium
C17: from Latin: a flowing out; see effluent
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1640s, from Latin effluvium "a flowing out," from effluere (see effluence).
Online Etymology Dictionary, © 2010 Douglas Harper
n. pl. ef•flu•vi•ums
A shedding, especially of hair.
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.