from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A substance that reduces the surface tension of a liquid, causing the liquid to spread across or penetrate more easily the surface of a solid.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a substance, such as a surfactant, that reduces the surface tension of a liquid, allowing it to spread across, and penetrate the surface of a solid

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved


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