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

In comparison, the likeliest exoplanets to host life orbit red dwarfs, the galaxy’s most common stars. — Andrew Paul, Popular Science, 23 Sep. 2026

Scientists have found that a distant world has a real rebellious streak, outwardly defying its red dwarf host star. — Robert Lea, Space.com, 22 Sep. 2026

Its host star is a dim bulb of a red dwarf about 49 light-years from our sun. — Phil Plait, Scientific American, 21 Aug. 2026

Looking at a red dwarf improves matters, since there’s less light overall, and planets are relatively larger compared to these small stars. — John Timmer, ArsTechnica, 16 July 2026

Word History

First Known Use

1926, in the meaning defined above

Rhymes for red dwarf

• morph
• orf
• wharf
• polymorph

Kids Definition

red dwarf

noun

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