magnetic pole

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Either of two limited regions in a magnet at which the field of the magnet is most intense, each of which is designated by the approximate geographic direction to which it is attracted.
2. n. Either of two variable points on the earth, close to but not coinciding with the geographic poles, where the magnetic field of the earth is most intense and toward which the needle of a compass points.

Wiktionary

1. n. Either of the two points, near the ends of a magnet, at which the magnetic lines of force converge.
2. n. Either of the two locations on a planet's surface at which the planet's magnetic field lines are vertical.

GNU Webster's 1913

1. n. Either of two points where the lines of force of the earth's magnetic field are vertical.
2. n. One of the two ends of a magnet where the magnetic field is strongest.
3. n. See under Magnetic.

WordNet 3.0

1. n. either of two points where the lines of force of the Earth's magnetic field are vertical
2. n. one of the two ends of a magnet where the magnetism seems to be concentrated