a compass having a magnetized needle generally in line with the magnetic poles of the earth.
a compass containing a magnetic needle pivoted in a horizontal plane, that indicates the direction of magnetic north at points on the earth’s surface
noun, Metallurgy. 1. beneficiation of crushed ore in which a magnetic mineral is separated from gangue by means of a magnetic field.
- Magnetic confinement
noun 1. another name for containment (sense 3)
- Magnetic constant
noun 1. the permeability of free space, which has the value 4π × 10–7 henry per metre M0 Also called absolute permeability
noun 1. Computers. 1 (def 12a). 2. Electricity. 1 (def 3).