magnet-, magneto- +

(Greek: Magnesian [stone]; Magnesia having been a mineral-rich region of Thessaly)

1. The region surrounding an astronomical object; such as, the earth, in which charged particles are trapped and affected by the object's magnetic field.
2. A region between five hundred and several thousand miles above the earth's surface, in which charged particles are trapped by the earth's magnetic field.
The branch of physics dealing with magnetic phenomena that are constant in time.
The orientation or movement of a motile organism in response to a magnetic field.
magnetotherapy, magnetotherapeutics
The attempt to treat a disease by the application of magnets to the surface of the body.
The passing of an electric current through semimetals; such as, the elements of bismuth and antimony, in the presence of a magnetic field.
1. A vacuum tube in which the flow of electrons is manipulated by electric and magnetic fields to generate microwaves.

The microwave radiation produced is either pulsed, for use in radar applications, or continuous, as required for microwave cooking.

2. A diode vacuum tube in which the flow of electrons is controlled by an externally applied magnetic field to generate power at microwave frequencies.
Magnetism induced by the action of light.
Maganetism resulting from mechanical stress or the reverse effect.
A reference to magnetism that is changed or generated by the action of heat.