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

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

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

From Los Angeles Times ● Feb. 19, 2025

The radiant heat installer and electrician were happy.

From Seattle Times ● Dec. 25, 2023

Professor Tyndall found that the moisture alone in the air of an ordinary room, absorbed from fifty to seventy times as much of the radiant heat as the air does.

From Lectures on Ventilation Being a Course Delivered in the Franklin Institute of Philadelphia by Lewis W. Leeds

Random Word

Spin the wheel and learn a new word!

Get a word

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