north as indicated by a magnetic compass, differing in most places from true north.
the direction in which a compass needle points, at an angle (the declination) from the direction of true (geographic) north
The direction toward which the north-seeking arrow of a compass points. ◇ The magnetic north pole is the northern pole of the Earth’s magnetic field and changes slightly in response to variations in the Earth’s magnetism. The current magnetic north pole is located in the Arctic Islands of Canada. Compare geographic north.
The direction of the north magnetic pole.
- Magnetic particle inspection
noun 1. (engineering) a method of testing for cracks and other defects in a magnetic material, such as steel, by covering it with a magnetic powder and magnetizing it: any variation in the concentration of the powder indicates a flaw in the material
noun 1. a phonograph pickup in which the vibrations of the stylus cause variations in or motions of a coil in a magnetic field that produces corresponding variations in an electrical voltage.
- Magnetic pick-up
noun 1. a type of record player pick-up in which the stylus moves an iron core in a coil, causing a changing magnetic field that produces the current
noun 1. the region of a magnet toward which the lines of magnetic induction converge (south pole) or from which the lines of induction diverge (north pole) 2. either of the two points on the earth’s surface where the dipping needle of a compass stands vertical, one in the arctic, the other in the antarctic. […]