磁じ針しん

じ

し

ん

Meanings

1

noun

magnetic needle

Refers to a magnetized needle, especially in a compass. Common in technical or navigational contexts.

方ほう位い磁じ針しん
方位磁針 specifically means a compass (the whole instrument), while 磁針 refers only to the magnetic needle itself.
地じ震しん
Homophone meaning 'earthquake'. Context usually makes the meaning clear.

Compound of 磁 (ji, 'magnet') and 針 (shin, 'needle'). The reading じしん is the standard on'yomi combination.