monopole

noun

1. magnetic monopole.

noun physics

1. a magnetic pole considered in isolation
2. Also called: magnetic monopole a hypothetical elementary particle postulated in certain theories of particle physics to exist as an isolated north or south magnetic pole

1. The minimal region for which lines of force, as from an electric or magnetic field, either all enter or all leave the region. Particles with electric charge, such as electrons, are monopoles; though magnetic fields can behave as if generated by sets of monopoles (as in the case of magnetic dipoles), it is not known whether isolable magnetic monopoles exist.