Monoceros R2 molecular cloud

Monoceros R2 molecular cloud

[mə′näs·ə·rəs ¦är¦tü mə′lek·yə·lər klau̇d]
(astronomy)
A massive rotating gas cloud with an abundance of various molecules that contains a compact H II region and is a region of active star formation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.