roasting of a nonmagnetic ore to render it magnetic so that it can be separated from gangue by means of a magnetic field.
noun, Optics. 1. .
[mag-net-iks] /mægˈnɛt ɪks/ noun, (used with a singular verb) 1. the science of . /mæɡˈnɛtɪks/ noun 1. (functioning as sing) the branch of physics concerned with magnetism
- Magnetic south
magnetic south The direction toward which the south-seeking arrow of a compass points. ◇ The magnetic south pole is the southern pole of the Earth’s magnetic field and changes slightly in response to variations in the Earth’s magnetism. The current magnetic south pole is located in the Antarctic Ocean. Compare geographic south.
noun, Astronomy. 1. a star having a strong magnetic field.