isogonal line

noun

an imaginary line, or one drawn on a map, connecting all points of equal magnetic declination.
Also called isoganal, i·so·gone [ahy-suh-gohn] /ˈaɪ səˌgoʊn/, isogonic.

Words nearby isogonal line

isogenous, isogeotherm, isogloss, isogon, isogonal, isogonal line, isogonic, isogonic line, isograd, isogradient, isograft