brown dwarf

noun

Synonyms of brown dwarfnext
: a celestial object that is much smaller than a normal star and has insufficient mass to sustain nuclear fusion but that is hot enough to radiate energy especially at infrared wavelengths

Examples of brown dwarf in a Sentence

Recent Examples on the Web
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The discovery team inferred the planet's presence using the Very Large Telescope in Chile, after detecting an unusual backward wobble in the brown dwarfs' orbits. Sharmila Kuthunur, Space.com, 26 Dec. 2025 The team aims to test this hypothesis via James Webb observations of other metal-poor brown dwarfs. Chris Young, Interesting Engineering, 10 Nov. 2025 See All Example Sentences for brown dwarf

Word History

First Known Use

1975, in the meaning defined above

Time Traveler
The first known use of brown dwarf was in 1975

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Cite this Entry

“Brown dwarf.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brown%20dwarf. Accessed 3 Jan. 2026.

Kids Definition

brown dwarf

noun
: an object in space that is much smaller and dimmer than a normal star
Last Updated: - Updated example sentences
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