konsentrisk

Konsentrisk is an adjective used in Scandinavian languages, notably Swedish and Norwegian, to describe shapes or structures that share a common center. In English, the equivalent term is concentric. A konsentrisk arrangement consists of multiple layers or rings that have the same central point but different radii.

The word derives from the prefix con- meaning “together” and centrum meaning “center,” mirroring the etymology of the English term concentric.

In practice, konsentrisk is used in geometry to describe circles, spheres, or cylindrical shells that are arranged around a single center. It is also used more broadly to describe natural and man-made objects with layered organization around a nucleus or core, such as tree rings, planetary rings, or anatomical structures with concentric lamellae.

The concept contrasts with eccentric arrangements, where components do not share a center. See also concentric, eccentric.