dark matter

noun

: nonluminous matter not yet directly detected by astronomers that is hypothesized to exist to account for various observed gravitational effects

Examples of dark matter in a Sentence

Recent Examples on the Web
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This new dark matter/black hole theory doesn't work with all recipes of black holes, however. Robert Lea, Space.com, 25 Aug. 2025 These celestial bodies serve as natural laboratories because different theoretical models of dark matter would affect them in distinct, observable ways. Mrigakshi Dixit, Interesting Engineering, 22 Aug. 2025 For example, Cranmer and his collaborators used a machine learning model to predict the density of clumps of dark matter in the universe, based on observable properties of other such nearby clumps. Anil Ananthaswamy, Wired News, 16 Aug. 2025 Dark energy and dark matter, for instance, have never been directly detected—only their effects. Sarah Scoles, JSTOR Daily, 31 July 2025 See All Example Sentences for dark matter

Word History

First Known Use

1933, in the meaning defined above

Time Traveler
The first known use of dark matter was in 1933

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Cite this Entry

“Dark matter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark%20matter. Accessed 5 Sep. 2025.

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