Confusion regarding insulator and conductors

[chaos333]

In textbooks, are words such as 'metallic', 'metal', etc indicating to the person doing the problem that the material in question is a conductor? This one problem said 'metallic' and the answers were as if it were a conductor with the electric field between 2 concentric hollow spheres being 0 and the outside of the entire thing just being dependent on the surface charge of the outer hollow sphere-- properties of a conductor.

 

[Baluncore]

In textbooks, are words such as 'metallic', 'metal', etc indicating to the person doing the problem that the material in question is a conductor?

Yes. Metals are electrically conductive materials.
https://en.wikipedia.org/wiki/Metal