Noun
multipole (plural multipoles)
(physics) Any of a several forms of static or oscillating distributions of charge or magnetization
If the source of Φ(r) is a dipole, as it is assumed here, this term is the only non-vanishing term in the multipole expansion of Φ(r). Source: Internet
The field of a point dipole has a particularly simple form, and the order-1 term in the multipole expansion is precisely the point dipole field. Source: Internet
This is simply one term in the multipole expansion when the total charge ("monopole moment") is 0 — as it always is for the magnetic case, since there are no magnetic monopoles. Source: Internet
This term appears as the second term in the multipole expansion of an arbitrary electrostatic potential Φ(r). Source: Internet