noun Physics.
a unit of magnetic moment, used in measuring the magnetic moment of atomic and subatomic particles.

1910–15; magnet- + -on1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
magneton (ˈmæɡnɪˌtɒn, mæɡˈniːtɒn)
1.  Also called: Bohr magneton, β, mB 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
2.  Also called: nuclear magneton a similar unit equal to βm/M where M is the mass of the proton
[C20: from magnet + (electr)on]

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American Heritage
Science Dictionary
magneton   (māg'nĭ-tŏn')  Pronunciation Key 
A unit of the magnetic dipole moment of a molecular, atomic, or subatomic particle. ◇ The Bohr magneton is defined as the magnetic dipole moment of the electron due to its inherent spin angular momentum, and is equal to 9.2741 × 10-24 joules per tesla. Also called Landé factor. ◇ The nuclear magneton is defined using the electric charge and rest mass of the proton, and is equal to 5.0508 × 10-27 joules per tesla.
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Encyclopedia Britannica


unit of magnetic moment (the product of a magnet's pole strength and the distance between its poles) used in the study of subatomic particles. The Bohr magneton, named for the 20th-century Danish physicist Niels Bohr, is equal to about 9.273 10-21 erg per gauss per particle. The nuclear magneton, calculated using the mass of the proton (rather than that of the electron, used to calculate the Bohr magneton) equals 1/1,836 Bohr magneton. See magnetic dipole.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Cryogenic polarized nuclear spins are better, but the nuclear magneton is small.
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