fraunhofer lines

POS

Noun Plural

HYPHEN

Fraun=ho=fer lines

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CIDE DICTIONARY

fraunhofer lines, prop. n. pl.

The lines of the spectrum; especially and properly, the dark lines of the solar spectrum, so called because first accurately observed and interpreted by Fraunhofer, a German physicist. [1913 Webster]

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OXFORD DICTIONARY

fraunhofer lines, n.pl. the dark lines visible in solar and stellar spectra.

Etymology

J. von Fraunhofer, Bavarian physicist d. 1826

For further exploring for "fraunhofer lines" in Webster Dictionary Online

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