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The splitting of single spectral lines of an emission spectrum into three or more polarized components when the radiation source is in a magnetic field.
[After Pieter Zeeman.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(General Physics) the splitting of a spectral line of a substance into several closely spaced lines when the substance is placed in a magnetic field
[C20: named after Pieter Zeeman (1865–1943), Dutch physicist]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014