nonconductor
/ˌnɑnkənˈdʌktər/
noun
- A material or substance that does not readily transmit heat, electricity, or sound; an insulator.
- Wood is a natural nonconductor of heat, which is why wooden spoons are used for cooking.
- Rubber is a nonconductor of electricity, making it perfect for protective gear.
- Air is a nonconductor of sound in a vacuum, but it conducts sound under normal conditions.
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