magnetic variation

English Thesaurus

1. the angle (at a particular location) between magnetic north and true north (noun.shape)

hypernym	:	angle,
definition	:	the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians (noun.shape)

derivation	:	vary,
definition	:	be subject to change in accordance with a variable (verb.stative)

derivation	:	vary,
definition	:	be subject to change in accordance with a variable (verb.stative)