Fraunhofer(redirected from Fraunhoffer)
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Joseph von . 1787--1826, German physicist and optician, who investigated spectra of the sun, planets, and fixed stars, and improved telescopes and other optical instruments
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A unit for measurement of the reduced width of a spectrum line such that a spectrum line's reduced width in fraunhofers equals 106 times its equivalent width divided by its wavelength.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.