You searched for: “insulator
insulator
A material that is a very poor conductor of electricity.

The insulating material is usually composed of ceramic or fiberglass used in a transmission line and is designed to support a conductor physically and to separate it electrically from other conductors and supporting materials.

This entry is located in the following unit: Energy Sources and Related Information + (page 2)
insulator (s) (noun), insulators (pl)
Devices with high resistance to heat, electricity, or sounds; for example, electrical insulators prevent electricity from sending currents to other objects.
This entry is located in the following unit: Technical Science and Engineering (page 2)