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, mB
2. Also called: nuclear magneton
a similar unit equal to βm/M where M is the mass of the proton
Word origin
C20: from magnet + (electr)on
nuclear magneton in American English
noun
Physics
a unit of magnetic moment, used to measure proton spin and approximately equal to 1⁄1836 Bohr magneton