surfactant
/səɹˈfæktənt/IPA: /S ER0 F AE1 K T AH0 N T/
noun
- 1
A surface active agent, or wetting agent, capable of reducing the surface tension of a liquid; typically organic compounds having a hydrophilic "head" and a hydrophobic "tail".
- 2
A lipoprotein in the tissues of the lung that reduces surface tension and permits more efficient gas transport.
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