Noun
One who, or that which, insulates.
The substance or body that insulates; a nonconductor.
Source: Webster's dictionaryIt is necessary to have lived in this insulator which is called the national assembly, in order to perceive how the men who are the most completely ignorant of the state of the country are almost always the ones who represent it. Pierre-Joseph Proudhon
A common choice is a solid polyethylene (PE) insulator, used in lower-loss cables. Source: Internet
A large variety of telephone, telegraph and power insulators have been made; some people collect them, both for their historic interest and for the aesthetic quality of many insulator designs and finishes. Source: Internet
Also, if one of the insulator units in the string breaks, it can be replaced without discarding the entire string. Source: Internet
An (intrinsic) semiconductor has a band gap that is smaller than that of an insulator and at room temperature significant numbers of electrons can be excited to cross the band gap. Source: Internet
A pure semiconductor, however, is not very useful, as it is neither a very good insulator nor a very good conductor. Source: Internet