nonconductor
Definition
Noun: A substance that does not readily allow the passage of heat, electricity, sound, or light. It is characterized by having negligible electrical or thermal conductivity.
Examples of Usage
- Rubber is an excellent nonconductor of electricity, which is why it is used to coat electrical wires.
- Dry wood acts as a nonconductor and is safe to handle live electrical equipment with, unlike metal.
- For the experiment, we need a nonconductor like glass to insulate the circuit.
Advanced Usage
- Technical Context: In physics and engineering, the term is used precisely to describe materials with very high resistivity, often quantified. For example, "The ceramic layer serves as a nonconductor to prevent thermal leakage."
- Comparative Use: Often used in contrast to "conductor" or "semiconductor" when discussing material properties. For example, "While copper is a conductor, plastic is a nonconductor."
Variants and Related Words
- Insulator (noun): This is a very common synonym. While all nonconductors are insulators, "insulator" often implies a practical application for blocking the flow of energy.
- Dielectric (noun): A more technical term, primarily used for an electrical insulator that can be polarized by an applied electric field.
- Nonconducting (adjective): Describing the property of being a nonconductor. For example, "a nonconducting material."
Synonyms
- Insulator
- Dielectric (specific to electricity)
- Poor conductor
Antonyms
- Conductor
- Semiconductor
Related Phrases
- Electrical nonconductor: Specifies the material's property regarding electricity.
- Thermal nonconductor: Specifies the material's property regarding heat.
Noun
-
a material such as glass or porcelain with negligible electrical or thermal conductivity
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