"Ring structure" refers to a shape or formation that is circular or loop-like. It is often used to describe a specific arrangement of atoms or molecules forming a closed loop in chemistry. Full definition
They demonstrated that their machine could build 14 different classes of small molecules, including ones with difficult - to - manufacture ring structures, all using the same automated building - block assembly. (sciencedaily.com)
One would expect that all of the molecules would be near the star, but with one of them we saw a clear ring structure. (sciencedaily.com)
The sixth planet in the solar system, noted for its obvious ring structure. (webbtelescope.org)