spiral galaxy

noun

: a galaxy exhibiting a central nucleus or barred structure from which extend curved arms of higher luminosity

called also spiral nebula

Examples of spiral galaxy in a Sentence

Recent Examples on the Web
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The supernova explosion, designated as SN 2018gv, is found in the spiral galaxy NGC 2525. Kenna Hughes-Castleberry, Space.com, 22 Aug. 2025 But the Outriggers quickly traced the signal to NGC4141, a spiral galaxy in Ursa Major. Neetika Walter, Interesting Engineering, 22 Aug. 2025 The fuzzy blob at the top resolves into a distant spiral galaxy unrelated to the object itself. Gayoung Lee, Scientific American, 12 Aug. 2025 What looks like a giant glowing penguin or a jumping porpoise was actually once a normal spiral galaxy, named NGC 2936, that got too close to its neighbor. Katie Liu, Discover Magazine, 31 July 2025 See All Example Sentences for spiral galaxy

Word History

First Known Use

1913, in the meaning defined above

Time Traveler
The first known use of spiral galaxy was in 1913

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Cite this Entry

“Spiral galaxy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spiral%20galaxy. Accessed 9 Sep. 2025.

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