Meaning of K star

K star

Pronunciation: [key]
— Astron. Astron.
  1. a relatively cool, orange-to-red star, as Aldebaran or Arcturus, having a surface temperature between 3500 and 5000 K and an absorption spectrum with strong lines of calcium and many neutral metals. Cf. spectral type.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.