B star: Meaning and Definition of

B star

Pronunciation: [key]
— Astron. Astron.
  1. a massive, relatively hot, blue to white star, as Rigel or Spica, having a surface temperature between 10,000 and 30,000 K and with an absorption spectrum dominated by the Balmer series of hydrogen with lines of neutral helium present. Cf. spectral type.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.