R Coronae Borealis star
R Coronae Borealis star
[¦är kə¦rō‚nē ‚bȯr·ē′al·əs ‚stär] (astrophysics)
A rare type of irregular variable star which has long periods of maximum brightness followed by a sudden, unpredictable reduction in brightness of several magnitudes, and a slower, sometimes erratic return to the original brightness.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.