surface-active agent

[sur-fis-ak-tiv]

sur·face-ac·tive a·gent

[sur-fis-ak-tiv]
noun Chemistry.
any substance that when dissolved in water or an aqueous solution reduces its surface tension or the interfacial tension between it and another liquid.
Also called surfactant.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Surface-active agent is always a great word to know.
So is glacial. Does it mean:
a compound in which oxygen is bonded to one or more electropositive atoms
of, pertaining to, or tending to develop into icelike crystals: glacial phosphoric acid
Encyclopedia Britannica
Encyclopedia

surface-active agent

substance such as a detergent that, when added to a liquid, reduces its surface tension, thereby increasing its spreading and wetting properties. In the dyeing of textiles, surface-active agents help the dye penetrate the fabric evenly. They are used to disperse aqueous suspensions of insoluble dyes and perfumes.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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