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wetting agent

American  

noun

Chemistry.
  1. 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.


wetting agent British  

noun

  1. 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

Etymology

Origin of wetting agent

First recorded in 1935–40

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