Synonyms

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

Orchard Hills homes are constructed with two factors in mind: radiant heat and ember intrusion.

From Los Angeles Times ● Feb. 19, 2025

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

How do we know that the interception of radiant heat by liquids and solids may not be due to an arrangement and comparative rigidity of their parts, which gases do not at all share?

From The Glaciers of the Alps Being a narrative of excursions and ascents, etc. by John Tyndall

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