grid variation
noun Navigation.
the angle, at any point on the surface of the earth, between the magnetic and true meridians passing through that point.
Also called
grivation.
Words nearby grid variation
grid declination,
grid leak,
grid networking,
grid reference,
grid road,
grid variation,
gridder,
griddle,
griddlebread,
griddlecake,
gride
British Dictionary definitions for grid variation
grid variation
noun
nautical
the angle between grid north and magnetic north at a point on a map or chart
Also called: grivation