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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
Their proximity allows material to flow from the subgiant to the white dwarf.
—Robert Lea, Space.com, 23 Dec. 2024
That appears to be what happened some 4000 light-years away, allowing a planet similar in mass and orbital position to slide twice as far from its star, surviving the star’s expansion into a red giant and subsequent contraction into a white dwarf.
—Christie Wilcox, science.org, 30 Sep. 2024
At that point, a thermonuclear explosion blasts the remaining material off the white dwarf, and the cycle resets.
—John Timmer, Ars Technica, 27 Sep. 2024
The Blaze Star has become a white dwarf, which happens when stars have exhausted their nuclear fuels.
—Julia Jacobo, ABC News, 31 Oct. 2024
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Word History
First Known Use
1922, in the meaning defined above
Dictionary Entries Near white dwarf
Cite this Entry
“White dwarf.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/white%20dwarf. Accessed 5 Jan. 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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