calcium reversal lines
calcium reversal lines
[′kal·se·əm ri′vər·səl ‚līnz] (spectroscopy)
Narrow calcium emission lines that appear as bright lines in the center of broad calcium absorption bands in the spectra of certain stars.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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