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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
As the Army explains, electromagnetic radiation (EM) from things like radar and telecommunications is believed to be potentially harmful to the body, notably the nervous system. — Christopher McFadden, Interesting Engineering, 25 July 2026 This method works by exposing screwworm larvae to gamma radiation, a specific type of electromagnetic radiation, which sterilizes the larvae. — Sarah Tomlinson, The Conversation, 24 July 2026 These jets too are responsible for bright emissions of electromagnetic radiation. — Robert Lea, Space.com, 10 July 2026 Solar flares are giant eruptions of electromagnetic radiation, including X-rays and ultraviolet light, which launch into space off the sun's surface, according to NASA. — Emily Mae Czachor, CBS News, 4 June 2026 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

Rhymes for electromagnetic radiation

See All Rhymes for electromagnetic radiation

Browse Nearby Words

electromagnetic pulse
electromagnetic radiation
electromagnetics
See all Nearby Words

Cite this Entry

“Electromagnetic radiation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electromagnetic%20radiation. Accessed 31 Jul. 2026.

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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

Britannica.com: Encyclopedia article about electromagnetic radiation

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