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fraudulently | fraught | fraughtage | fraughting | fraulein | fraunhofer lines | fraxin | fraxinella | fraxinus | fraxinus americana | fraxinus caroliniana

fraunhofer lines


Noun Plural
Fraun=ho=fer lines


fraunhofer linesprop. 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]


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

J. von Fraunhofer, Bavarian physicist d. 1826

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

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