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

1640–50; dilute + -ion

antidilution, adjective
nondilution, noun
overdilution, noun
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World English Dictionary
dilution (daɪˈluːʃən)
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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Word Origin & History

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-)

  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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