磁じ気き子し午ご線せん

noun

magnetic meridian

Technical term in geomagnetism and navigation; the line on the Earth's surface connecting the magnetic poles along which a compass needle aligns.

• 磁じ気き子し午ご線せんは真しんの子し午ご線せんとは少すこしずれている。

  The magnetic meridian deviates slightly from the true meridian.