red dwarf

noun

: a star having substantially lower surface temperature, intrinsic luminosity, mass, and size than the sun

Examples of red dwarf in a Sentence

Recent Examples on the Web
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Similar compact systems of small planets have been detected around many other red dwarf stars, which are the most common stars in the universe, says Rice University planetary scientist André Izidoro, who was not involved in the study. Tom Metcalfe, Scientific American, 17 Mar. 2025 All of them appeared to originate from a faint red dwarf star. Ashley Strickland, CNN, 14 Mar. 2025 Barnard’s star is a red dwarf star, a low-mass, cool star that comprises about 70% of all the stars in the Milky Way. Jamie Carter, Forbes, 12 Mar. 2025 Thankfully, there's another option: planets around red dwarf stars. Paul Sutter, Space.com, 21 Feb. 2025 See All Example Sentences for red dwarf

Word History

First Known Use

1926, in the meaning defined above

Time Traveler
The first known use of red dwarf was in 1926

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Cite this Entry

“Red dwarf.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/red%20dwarf. Accessed 31 Mar. 2025.

Kids Definition

red dwarf

noun
: a star having much lower surface temperature, brightness, mass, and size than the sun

More from Merriam-Webster on red dwarf

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