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emanation

[em-uh-ney-shuh n] /ˌɛm əˈneɪ ʃən/
noun
1.
an act or instance of emanating.
2.
something that emanates or is emanated.
3.
Physical Chemistry. a gaseous product of radioactive disintegration, including radon, thoron, and actinon. Symbol: Em.
Origin
1560-1570
1560-70; < Late Latin ēmānātiōn- (stem of ēmānātiō), equivalent to ēmānāt(us) (see emanate) + -iōn- -ion
Related forms
emanational, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for emanational

emanation

/ˌɛməˈneɪʃən/
noun
1.
an act or instance of emanating
2.
something that emanates or is produced; effusion
3.
a gaseous product of radioactive decay, such as radon
Derived Forms
emanational, adjective
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
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Word Origin and History for emanational
emanation
1570, from L.L. emanationem (nom. emanatio), from L. emanare "flow out, arise, proceed," from ex- "out" + manare "to flow."
Online Etymology Dictionary, © 2010 Douglas Harper
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emanational in Medicine

emanation em·a·na·tion (ěm'ə-nā'shən)
n.

  1. Something that issues from a source; an emission.

  2. Any of several radioactive gases that are isotopes of radon and are products of radioactive decay.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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