white dwarf

noun

plural white dwarfs
: a small hot whitish star of low intrinsic brightness usually with a mass approximately equal to that of the sun but with a density many times larger

Examples of white dwarf in a Sentence

Recent Examples on the Web
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Eventually, gravity will pull them back together again, and the celestial dance of the white dwarf collecting energy from its companion star will start over. Elizabeth Gamillo, Smithsonian Magazine, 3 July 2025 Understanding these explosions of white dwarf stars is critical to astronomers who use them to measure distances in space. Jamie Carter, Forbes.com, 2 July 2025 Since 1980, observatories studying this nebula have detected high-energy X-rays coming from the white dwarf at its core. Michael Irving, New Atlas, 9 Mar. 2025 Astronomers using the Hubble Space Telescope have discovered that a seemingly ordinary white dwarf star is actually the result of a dramatic stellar merger. Sharmila Kuthunur, Space.com, 18 Aug. 2025 See All Example Sentences for white dwarf

Word History

First Known Use

1922, in the meaning defined above

Time Traveler
The first known use of white dwarf was in 1922

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Cite this Entry

“White dwarf.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/white%20dwarf. Accessed 4 Sep. 2025.

Kids Definition

white dwarf

noun
: a small whitish star of low brightness that has a mass approximately equal to that of the sun but that is many times more dense

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