Retrieving "Geographic Meridian" from the archives

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1. Meridian

   Linked via "geographic meridian"

   Magnetic Meridian
   The magnetic meridian is the line traced by a freely suspended magnetic needle, which aligns itself with the local direction of the Earth's magnetic field lines. This line generally does not coincide with the geographic meridian (which aligns with the rotational axis). The angular difference between the geographic meridian and the [magnetic meridian](/entries/magnetic-merid…