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
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In the other giant radio galaxy, RAD J142004.0+621715 which has a 1.4-million-light-year-wide emission, one of the jets is also found to end in a large ring of radio emission. Keith Cooper, Space.com, 14 Oct. 2025 It was previously classified as a radio galaxy, but the new research released in March has revealed otherwise. Julia Musto, Fox News, 1 Apr. 2023 The galaxy, which is named Alcyoneus, is a giant radio galaxy. Joshua Hawkins, BGR, 19 Feb. 2022 MeerKAT is already trying to find similarly gargantuan filaments in other radio galaxies. Robin George Andrews, Scientific American, 16 Apr. 2020

Word History

First Known Use

1959, in the meaning defined above

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

Cite this Entry

“Radio galaxy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radio%20galaxy. Accessed 24 Oct. 2025.

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