radiant heat

American  

noun

Thermodynamics.

1. heat energy transmitted by electromagnetic waves in contrast to heat transmitted by conduction or convection.

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radiant heat British  

noun

1. heat transferred in the form of electromagnetic radiation rather than by conduction or convection; infrared radiation

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Etymology

Origin of radiant heat

First recorded in 1500–10

Example Sentences

See Examples For:

radiant heat

Another important factor was what was called radiant heat, he said.

From BBC ● Aug. 20, 2026

Put your windows on lockdown: Close blinds, shades or curtains during peak daylight hours — especially on south- and west-facing walls — to block radiant heat from entering.

From MarketWatch ● Jun. 29, 2026

I responded: “I don’t want any air space. Put the insulation in direct contact with the radiant heat tubes and do whatever is necessary to ensure it never falls down.”

From Seattle Times ● Jan. 25, 2024

Like any hot object, it was giving off radiant heat -- what we’d now call long-wave infrared radiation.

From Scientific American ● Nov. 9, 2023

It is our rapid motion through the æther which produces those waves known to man as radiant heat and light.

From Autobiography of an Electron Wherein the Scientific Ideas of the Present Time Are Explained in an Interesting and Novel Fashion by Charles R. (Charles Robert) Gibson