| Subject | Dutch | English |
| environ. | element dat inwerkt op de oppervlakte | surface active compound Any soluble substance composed of two or more unlike atoms held together by chemical bonds that reduces interfacial tension between liquids or a liquid and a solid, often used as detergents, wetting agents and emulsifiers |
| environ. | element dat inwerkt op de oppervlakte | surface active compound |
| el. | oppervlakte-element | incremental area |