Relating to or caused by magnetic fields that are generated by or affect living organisms and biological systems.
From bio- (life) + magnetic (from medieval Latin magneticus, related to magnets). Combined in the 20th century as scientists discovered living things produce magnetic fields.
Sea turtles and migratory birds have biomagnetic navigation systems—they literally sense Earth's magnetic field like a built-in GPS to find their way across oceans and continents!
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