radiant heat

American

noun

Thermodynamics.

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

radiant heat British

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of radiant heat

First recorded in 1500–10

Example Sentences

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radiant heat

This includes people employed in construction and agriculture as well as those who work in indoor environments with radiant heat and no air conditioning, such as pizza kitchens.

From MarketWatch ● Jun. 30, 2026

It measures not just the air temperature but takes into account humidity, radiant heat from the sun and the court surface temperature.

From BBC ● Jun. 28, 2026

The radiant heat installer and electrician were happy.

From Seattle Times ● Dec. 25, 2023

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

Rādiophon′ics, Rā′diophony, the production of sound by radiant heat; Rā′dium, a rare element whose radiations act upon photographic plates and have properties like the X-rays.

From Chambers's Twentieth Century Dictionary (part 3 of 4: N-R) by Various

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023