The angle between the magnetic meridian and geographical meridian is called

The angle between the magnetic merdian and geographical merdian is called

The angle between the magnetic merdian and geographical merdian is called

At any place on the earth, the angle between the magnetic meridian and the geographic meridian is called ....

Angle between magnetic meridian and geographical meridian is called

At a given place on the Earth, the angle between the Magnetic meridian and the Geographic meridian is called ......

Define magnetic meridian.