(n) phenomenon exhibited by materials like copper or bismuth that become magnetized in a magnetic field with a polarity opposite to the magnetic force; unlike iron they are slightly repelled by a magnet
The Collaborative International Dictionary of English (GCIDE) v.0.53
a. Pertaining to, or exhibiting the phenomena of, diamagnetism; taking, or being of a nature to take, a position at right angles to the lines of magnetic force. See Paramagnetic. [ 1913 Webster ]
Diamagnetic attraction. See under Attraction. [ 1913 Webster ]
n. Any substance, as bismuth, glass, phosphorous, etc., which in a field of magnetic force is differently affected from the ordinary magnetic bodies, as iron; that is, which tends to take a position at right angles to the lines of magnetic force, and is repelled by either pole of the magnet. Contrasted with paramagnetic and ferromagnetic. [ 1913 Webster ]
n. 1. The science which treats of diamagnetic phenomena, and of the properties of diamagnetic bodies. [ 1913 Webster ]
2. The magnetic action which characterizes diamagnetic substances, the magnetic moments of which tend to oppose an externally applied magnetic field. Contrasted with paramagnetism and ferromagnetism. [ 1913 Webster +PJC ]
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