diamagnetism
Physics term for the property of materials that are repelled by a magnetic field; opposite of paramagnetism.
Water is one of the substances that exhibit diamagnetism.
Diamagnetic materials have the property of being repelled by a magnet.
Ferromagnetism: strong permanent magnetism seen in materials like iron, much stronger than diamagnetic effects.
From 反 (anti-) + 磁性 (magnetism). A modern scientific compound.