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A line connecting all points on the earth's surface at which a magnetic needle balances horizontally without dipping. Also called aclinic line.
(General Physics) an imaginary line on the earth's surface, near the equator, at all points on which there is no magnetic dip. Also called: aclinic line
a•clin′ic line′(eɪˈklɪn ɪk)
an imaginary line on the surface of the earth, close and approximately parallel to the equator, connecting all those points over which a magnetic needle shows no inclination from the horizontal. Also called magnetic equator.
[1840–50; < Greek aklin(ḗs) not bending + -ic]
A line drawn on a map or chart connecting all points at which the magnetic inclination (dip) is zero for a specified epoch. Also called aclinic line.