insulator.

A material or component that reduces the passage of electricity, heat, or sound.

Use it for

Words that belong together

• electrical insulator
• thermal insulator

On the page

The ceramic insulator prevented contact with the live cable.

Usage notes

Primary category: sci-fi. Forms: Singular insulator; plural insulators. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: description, technology. Commonness: moderately common.