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wetting agent

noun, Chemistry.
any admixture to a liquid for increasing its ability to penetrate, or spread over the surface of, a given material, especially cloth, paper, or leather.
Origin of wetting agent
First recorded in 1935-40 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for wetting agent

wetting agent

(chem) any substance added to a liquid to lower its surface tension and thus increase its ability to spread across or penetrate into a solid
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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