Astron.
any of a class of blue celestial objects, at one time thought to be stars, that do not emit appreciable radio waves. Abbr.: BSO
Astron.
any of a class of blue celestial objects, at one time thought to be stars, that do not emit appreciable radio waves. Abbr.: BSO
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012