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.
magnetic equator n. A line connecting all points on the earth's surface at which a magnetic needle balances horizontally without dipping. Also called aclinic line.
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.
[ey-klin-ik] 
s
nein