noun
EXAMPLES FROM CORPUS
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In a few rare cases, lava flows on land have taken place just as the magnetic field was undergoing a reversal.
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In the case of the human body, that steady field is the Earth's magnetic field .
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More strikingly, it demonstrated that a toroidal discharge in a toroidal magnetic field established its own stable configuration.
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The magnetic field is thus one aspect of the earth that scientists have studied in detail for centuries.
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The magnetic field that led to its discovery had vanished at the moment of that radio shriek.