R star

R star

[′är ‚stär]

(astronomy)

A star of spectral type R, having spectral characteristics similar to those of types G and K, except that molecular bands of molecular carbon (C₂), cyanogen radical (CN), and methyldadyne (CH) are prominent.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.