surfactant Definition
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surfactant
noun
- 1. Any soluble substance, such as a detergent, wetting agent, emulsifier, foaming agent, etc, that reduces the surface tension of a liquid, or reduces the surface tension between two liquids or between a solid and a liquid.
2. zool.
- A substance secreted by the cells lining the alveoli of the lungs that prevents the walls of the alveoli from sticking together and the lungs from collapsing.
