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BNC: 39907 COCA: 36844

surfactant

noun
/sɜːˈfæktənt/
/sɜːrˈfæktənt/
[countable, uncountable]
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  1. (specialist) a substance that reduces the surface tension of a liquid, often forming bubbles in the liquid表面活性剂(减少液体表面张力,常形成气泡)
  2. (medical医学) a substance that keeps the lungs working well to prevent breathing problems肺泡表面活性物质(维持肺部良好工作、防止呼吸困难)
  3. Word Origin1950s: from surf(ace)-act(ive) + -ant.

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