spectral line(redirected from Isomer shift)
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An isolated bright or dark line in a spectrum produced by emission or absorption of light of a single wavelength.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
a line in a spectrum due to the absorption or emission of light at a discrete frequency.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.