diamagnet

[Waisher]

a substance that exhibits diamagnetism

[Anthonyacox]

Any material that exhibits diamagnetism

[sumon9999]

A diamagnet is a type of material that is not naturally magnetic but can generate a magnetic field in opposition to an externally applied magnetic field. This results in a repelling effect. All materials display some degree of diamagnetism, but in materials classified as diamagnetic, this is the strongest magnetic property. Examples of diamagnetic materials include copper, lead, and carbon graphite.

[mehmood]

a body having diamagnetic polarity