magnetic-equator

magnetic equator

noun

Origin:
1825–35

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Collins
World English Dictionary
magnetic equator
 
n
Also called: aclinic line an imaginary line on the earth's surface, near the equator, at all points on which there is no magnetic dip

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
magnetic equator  
A line connecting all points on the earth's surface at which the magnetic field is parallel to the Earth's surface. A balanced magnetic needle on the magnetic equator stabilizes in a perfectly horizontal position.
The American Heritage® Science Dictionary
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