In other words, its universal covering space has a hyperbolic, Euclidean, or spherical structure.

The most notable aspect of the tower is that it has a spherical structure at the top, similar to a golf ball.

Looming ahead was a spherical structure that my friend identified as a geodesic dome.

He pointed to a spherical structure about one hundred yards away.

Based on Toq's briefing, they were beaming into a tube that linked two of the spherical structures.

In its center was a spherical structure of girders and beams.

The spherical structure is induced by the protein's tertiary structure.

During the summer months, numerous spherical structures called sporocarps form on the undersides of the branches.

For the artillery fungus, the answer is a small, rigid, spherical structure.

This is a spherical structure with stone steps winding round the outside.