Fraunhofer, Joseph von, German optician, born in Straubing, Bavaria; after serving an apprenticeship as a glass-cutter in Münich, he rose to be manager of an optical institute there, and eventually attained to the position of professor in the Academy of Sciences; his name is associated with many discoveries in optical science as well as inventions and improvements in the optician's art; but he is chiefly remembered for his discovery of the dark lines in the solar spectrum, since called after him the Fraunhofer lines (1787‒1826).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Fraticelli * Fredegonda