Definition that contains magnetic needle
- dip (physics) the angle that a magnetic needle makes with the plane of the horizon
- inclination (physics) the angle that a magnetic needle makes with the plane of the horizon
- magnetic equator an imaginary line paralleling the equator where a magnetic needle has no dip
- magnetic inclination (physics) the angle that a magnetic needle makes with the plane of the horizon
- angle of dip (physics) the angle that a magnetic needle makes with the plane of the horizon
- magnetic compass compass based on an indicator (as a magnetic needle) that points to the magnetic north
- aclinic line an imaginary line paralleling the equator where a magnetic needle has no dip
- magnetic dip (physics) the angle that a magnetic needle makes with the plane of the horizon