表ひょう面めん活かっ性せい剤ざいひょうめんかっせいざいMeanings1nounsurface-active agent; surfactantTechnical term in chemistry and related fields; synonymous with 界面活性剤 (かいめんかっせいざい), which is more common.See also: 界面活性剤この洗せん剤ざいには表ひょう面めん活かっ性せい剤ざいが含ふく