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emanation

 - 5 dictionary results

em⋅a⋅na⋅tion

  [em-uh-ney-shuhn]
Use emanation in a Sentence
–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:
1560–70; < LL ēmānātiōn- (s. of ēmānātiō), equiv. to ēmānāt(us) (see emanate ) + -iōn- -ion

Related forms:
em⋅a⋅na⋅tion⋅al, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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em·a·na·tion   (ěm'ə-nā'shən)   
n.  

  1. The act or an instance of emanating.

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

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

em'a·na'tion·al adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

emanation 
1570, from L.L. emanationem (nom. emanatio), from L. emanare "flow out, arise, proceed," from ex- "out" + manare "to flow."
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: em·a·na·tion
Pronunciation: "em-&-'nA-sh&n
Function: noun
1 : the action of emanating
2 a : something that emanates or is produced by emanation b : a heavy gaseous element produced by radioactive disintegration emanation>
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

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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