radio galaxy

noun

: a galaxy that is a powerful source of radio waves

Examples of radio galaxy 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.
The X-ray emissions from these radio galaxies come from jets of particles blasted out from around feeding supermassive black holes at near-light speeds. — Robert Lea, Space.com, 29 July 2026 The surrounding plumes of incredibly hot gas exert their own pressure, in this case even higher than most other radio galaxies. — Andrew Paul, Popular Science, 15 Jan. 2026 With jets both in the plane of the school and with one directed at us, this galaxy was reclassified as a radio galaxy with a blazar at its center. — Julia Musto, Fox News, 1 Apr. 2023 See All Example Sentences for radio galaxy

Word History

First Known Use

1959, in the meaning defined above

Time Traveler
The first known use of radio galaxy was in 1959

Browse Nearby Words

radio-frequency amplification
radio galaxy
radiogenetics
See all Nearby Words

Cite this Entry

“Radio galaxy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radio%20galaxy. Accessed 5 Aug. 2026.

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More from Merriam-Webster on radio galaxy

Britannica.com: Encyclopedia article about radio galaxy

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