concentric
US /kənˈsen.trɪk/
UK /kənˈsen.trɪk/

1.
concentrico
of or denoting circles or spheres sharing the same center
:
•
The target has several concentric rings.
Il bersaglio ha diversi anelli concentrici.
•
The ripples spread out in concentric circles.
Le increspature si sono diffuse in cerchi concentrici.