dwarf star

noun1

1. •
   A star that is located in the main sequence in the Hertzsprung-Russell diagram, though generally excluding the small minority which fall in the blue band due to their large size and high luminosity; fuses hydrogen into helium in its core.

   • The study team said it’s likely the star was a companion to a white dwarf star, which is the remaining core of a dead star that has expelled the gases that serve as its nuclear fuel. — 2024