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Any unit of measurement of the magnetic moment of a molecular, atomic, or subatomic particle, especially the Bohr magneton or nuclear magneton.
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.
1. (Units) Also called: Bohr magneton a unit of magnetic moment equal to eh/4πm where e and m are the charge and mass of an electron and h is the Planck constant. It has the value 9.274 096 × 10–24 joule per tesla. Symbol: β or mB
2. (Units) Also called: nuclear magneton a similar unit equal to βm/M where M is the mass of the proton
[C20: from magnet + (electr)on]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a unit of magnetic moment, used in measuring the magnetic moment of atomic and subatomic particles.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.