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1. (n.) magnetic needle
a slender magnetized steel rod that when adjusted to swing in a horizontal plane, as in a compass, indicates the direction of the earth's magnetic fields.
Etymology: (1840–50)
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| Definition of 'magnetic needle' |
Princeton's WordNet |
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1. (noun) magnetic needle
a slender magnet suspended in a magnetic compass on a mounting with little friction; used to indicate the direction of the earth's magnetic pole
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| Definition of 'magnetic needle' |
The Standard Electrical Dictionary |
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1. magnetic needle
A magnet with a cup or small depression at its centre and poised upon a sharp pin so as to be free to rotate or oscillate in a horizontal plane. The cup is often made of agate. Left free to take any position, it places its magnetic axis in the magnetic meridian.
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Definitions of magnetic needle 
