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

This binary consists of a pre-main-sequence star that has gathered mass but hasn't yet triggered the fusion of hydrogen to helium in its core, and its companion, a red dwarf star. — Robert Lea, Space.com, 17 July 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

It was discovered almost a decade ago, and orbits a small red dwarf star called LHS 1140, which is almost 49 light-years away from our solar system. — Doyle Rice, USA Today, 16 July 2026

Many stars are simply too dim to detect in visible light, particularly the abundant red dwarf stars that dominate the Milky Way. — Kaif Shaikh, Interesting Engineering, 7 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