Biomagnetism is the phenomenon of magnetic fields produced by living organisms; it is a subset of bioelectromagnetism. In contrast, organisms` use of magnetism in navigation is magnetoception and the study of the magnetic fields` effects on organisms is magnetobiology. (The word biomagnetism has also been used loosely to include magnetobiology, .....
• (n.) Animal magnetism.
Bi`o·mag'net·ism noun [ Greek ... life + English magnetism .] Animal magnetism. 
biomagnetism 1. The magnetic field created by a living organism; such as, animal magnetism. 2. The effect of an external magnetic field on living organisms.