Found 2 items, similar to Isogonic lines.
English → English (WordNet) Definition: isogonic line isogonic line n : an imaginary line connecting points on the Earth's surface where the magnetic declination is the same [syn: isogonal line , isogone]
English → English (gcide) Definition: Isogonic lines Isogonic \I`so*gon"ic\, a. [Iso- + Gr. gwni`a angle.] Pertaining to, or noting, equal angles. [1913 Webster] Isogonic lines (Magnetism), lines traced on the surface of the globe, or upon a chart, connecting places at which the deviation of the magnetic needle from the meridian or true north is the same. [1913 Webster]