achterlaag

Achterlaag is a Dutch noun meaning the back or underlying layer, formed from achter (behind) and laag (layer). It is used in several domains to denote a layer that lies behind or beneath the primary surface.

In geology and geography, the term can describe the underlying soil, sediment, or rock layer beneath a more visible stratum. In construction and materials science, het can refer to a base or foundation layer that supports a top coating or structure, providing stability, adhesion, or insulation.

In art, printing, and photography, a achterlaag may be a preparatory layer laid down before the top surface, serving as a primer, underpainting, or background that influences texture and tone. In information technology and software design, the term is used metaphorically to describe the layer that underpins user-facing components, such as data models, business logic, or back-end services that lie behind the front-end interface.

Usage notes: more common terms for closely related concepts include onderlaag (underlay) and grondlaag (base layer). Achterlaag tends to appear in technical or domain-specific contexts and can often be replaced by more precise terminology depending on the field. Overall, it conveys the idea of a foundational or hidden layer that supports the observable layer above.