magnetic dipole moment

World English Dictionary
magnetic dipole moment
 
n
Compare electromagnetic moment m, j, Also called: magnetic moment a measure of the magnetic strength of a magnet or current-carrying coil, expressed as the torque per unit magnetic-flux density produced when the magnet or coil is set with its axis perpendicular to the magnetic field

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American Heritage
Science Dictionary
magnetic dipole moment  
A vector quantity associated with the magnetic properties of electric current loops or, more generally, magnets. It is equal to the amount of current flowing through the loop multiplied by the area encompassed by the loop, and its direction is established by the right hand rule for rotations. It can be thought of as a vector pointing from the south to the north of a magnetic dipole, and is then equal to the length of the dipole times the strength of either of its poles. Also called magnetic moment.
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