Of a material; Weakly repelled by a magnet. All substances are diamagnetic but the behavior is often masked by stronger forms of magnetism such as paramagnetic or ferromagnetic behavior.
Diamagnetism is caused by changes in the orbits of electrons in the substance induced by the applied field. Diamagnetic materials have a small negative magnetic susceptibility.
Relating to or exhibiting diamagnetism; slightly repelled by a magnet.