Meaning of red dwarf

red' dwarf'

Pronunciation: [key]
— Astron. Astron.
  1. any of the faint reddish stars having diameters about half that of the sun and low surface temperatures, about 2000–3000 K; a main sequence star of spectral type M.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.