What term is used for materials that allow heat and electricity to pass through them?

The term that describes materials capable of allowing heat and electricity to pass through them is "conductors." Conductors are substances that have free-moving charged particles, such as electrons, which can carry electrical current and thermal energy efficiently. This property makes conductors ideal for applications where the transmission of electricity and heat is required, such as in electrical wiring and heat transfer devices.

In contrast, insulators are materials that resist the flow of heat and electricity, making them useful for preventing energy loss or ensuring safety in electrical applications. Thermal regulators are not a standard term used in physics for describing materials based on their conductivity, while absorbers typically refer to materials that take in energy, such as light or heat, rather than transmitting it.