界かい面めん活かっ性せい剤ざい

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Meanings

1

noun

surfactant

Technical term used in chemistry, cosmetics, and detergents for a substance that reduces surface tension.

world, boundary

面mask, face, features

活lively, resuscitation, being helped

性sex, gender, nature

剤dose, medicine, drug

Compound of 界面 (interface, surface) + 活性 (activity) + 剤 (agent, chemical). A calque from English 'surface-active agent'.