Herbig emission star

Herbig emission star

[′hər·bik i¦mish·ən ‚stär]
(astronomy)
A relatively massive star in early stages of formation, still surrounded by a nebula which makes it variable in luminosity and renders its spectrum very peculiar.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.