Definition of magnetic moment
: a vector quantity that is a measure of the torque exerted on a magnetic system (as a bar magnet or dipole) when placed in a magnetic field and that for a magnet is the product of the distance between its poles and the strength of either pole
First Known Use of magnetic moment
Medical Definition of magnetic moment
Seen and Heard
What made you want to look up magnetic moment? Please tell us where you read or heard it (including the quote, if possible).