electromagnetic radiation

noun

: energy in the form of electromagnetic waves
also : a series of electromagnetic waves

Examples of electromagnetic radiation in a Sentence

Recent Examples on the Web
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What's more, the cycle repeats every 44 minutes, at least during periods of extreme activity. X-rays and radio waves are two different types of electromagnetic radiation. CBS News, 28 May 2025 Within the spectrum of electromagnetic radiation that reaches Earth, humans are only able to see a narrow range of wavelengths, called visible light. Margherita Bassi, Smithsonian Magazine, 27 May 2025 There remains a need for continued studies from the public and private sectors, especially the National Institutes of Health (NIH), to study factors including PFAS (per- and polyfluoroalkyl substances), microplastics, fluoride, electromagnetic radiation, and crop protection tools. Nick Mordowanec, MSNBC Newsweek, 22 May 2025 Solar flares are sudden bursts of electromagnetic radiation — a form of energy that includes radio waves, microwaves, X-rays, gamma rays and visible light — from the sun's surface. Daisy Dobrijevic, Space.com, 22 May 2025 See All Example Sentences for electromagnetic radiation

Word History

First Known Use

1891, in the meaning defined above

Time Traveler
The first known use of electromagnetic radiation was in 1891

Browse Nearby Words

Cite this Entry

“Electromagnetic radiation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electromagnetic%20radiation. Accessed 10 Jun. 2025.

Kids Definition

electromagnetic radiation

noun
: energy in the form of electromagnetic waves
also : a series of electromagnetic waves

Medical Definition

electromagnetic radiation

noun
: a series of electromagnetic waves

More from Merriam-Webster on electromagnetic radiation

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