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the dark lines in the solar spectrum corresponding to wavelengths originally emitted by inner layers of the Sun but then absorbed by various elements present in gaseous form in cooler layers and in the Earth's atmosphere.
Synonym(s): Fraunhofer lines
ab·sorp·tion lines(ăb-sōrp'shŭn līnz)
Dark lines in the solar spectrum due to absorption by the solar and the earth's atmosphere.
In spectroscopy, dark lines of the solar spectrum.