方ほう位い磁じ針しん

noun

magnetic compass

A compass that uses a magnetic needle to indicate direction. Often used in educational or technical contexts; 方位磁石 (ほういじしゃく) is a common synonym.

See also: 方位磁石

• 方ほう位い磁じ針しんを使つかって北きたの方ほう角がくを確たしかめた。

  I checked the direction of north using a magnetic compass.