Surface-active meaning

sûr'fəs-ăk'tĭv
Of, relating to, or being a substance capable of reducing the surface tension of a liquid in which it is dissolved. Used especially of detergents, wetting agents, and emulsifiers.
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Designating or of a substance, as a detergent or wetting agent, that lowers the surface tension of the solvent in which it is dissolved or the tension at the interface between two immiscible liquids.
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Capable of lowering the surface tension of a liquid.
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