This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Plural form of surfactant.

"First of all, there's a medicine called surfactants, and what those do, is those take those lungs that can be almost be like cardboard, just very, very tough, and make it hard to breathe, they soften those lungs so that the baby has an easier time breathing."

surfactant    detergent    diluents    nucleophile    emulsifier