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 However, many of the thousands of exoplanets scientists have identified so far orbit red dwarfs, which makes their presence likely; planets orbiting red dwarfs have a higher chance of being inhabitable, according to NASA. Jacopo Prisco, CNN, 13 June 2024 Research from 2013 suggested that as many as 4.5 billion potentially habitable planets may orbit around red dwarfs in our galaxy, but evidence to support this has been scant to non-existent. George Dvorsky / Gizmodo, Quartz, 23 May 2024 And since the red dwarf is still hot, there will eventually be a spark that triggers a runaway nuclear fusion reaction. Jacek Krywko, Ars Technica, 21 May 2024 In general, nature tends to make few big objects and lots of little ones; for example, high-mass stars are rare, and lower-mass ones such as red dwarfs are common. Phil Plait, Scientific American, 19 Jan. 2024 See all Example Sentences for red dwarf 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'red dwarf.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1926, in the meaning defined above

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

Dictionary Entries Near red dwarf

Cite this Entry

“Red dwarf.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/red%20dwarf. Accessed 7 Jul. 2024.

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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