In physics, there are several kinds of dipole:
*An electric dipole is a separation of positive and negative charges. The simplest example of this is a pair of electric charges of equal magnitude but opposite sign, separated by some (usually small) distance. A permanent electric dipole is called an electret.
*A magnetic dipole is a closed circulation of electric current. A simple example of this is a single loop of wire with some constant current through it.
*A current dipole is a current from a sink of current to a source of current within a (usually conducting) medium. Current dipoles a...