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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

radiant heat

Beyer said the material works by reflecting radiant heat and blocking embers from entering the structure.

From Los Angeles Times ● Sep. 2, 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

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

Keep in mind that the placement of insulation is vital to ensure all the heat produced by electric coils or radiant heat tubing is directed into the living space.

From Seattle Times ● Jan. 25, 2024

No light entered its deeps, but the radiant heat was mirrored on it as on the pallor of fluid lava.

From The Sea and the Jungle by H. M. (Henry Major) Tomlinson

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