dilution

[dih-loo-shuhn, dahy-]
noun
1.
the act of diluting or the state of being diluted.
2.
something diluted.

Origin:
1640–50; dilute + -ion

antidilution, adjective
nondilution, noun
overdilution, noun
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World English Dictionary
dilution (daɪˈluːʃən)
 
n
1.  the act of diluting or state of being diluted
2.  a diluted solution

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

dilution
1640s, noun of action from L. from dilut-, pp. stem of diluere (see dilute).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

dilution di·lu·tion (dī-lōō'shən, dĭ-)
n.

  1. The act of reducing the concentration of a mixture or solution.

  2. A diluted solution.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
dilution   (dĭ-l'shən)  Pronunciation Key 
The process of making a substance less concentrated by adding a solvent, such as water.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Follow label directions for dilution to avoid burning plants.
But if too much dilution occurs, the water will get lighter, idling on top and
  stalling out the system.
Therefore the only acceptable dilution is zero discharged pollutants.
Many professors look with horror on such a dilution of the tests.
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