mercury fulminate
A highly sensitive explosive compound used in primers and detonators. Technical term; also called 雷酸水銀.
See also: 雷酸水銀
Mercury fulminate is an explosive that is extremely sensitive to shock.
Mixed kanji-kana spelling; 汞 is a non-jōyō kanji, so this form may be used for readability.
From 雷 (rai, 'thunder') and 汞 (kō, 'mercury'), referring to its explosive nature and mercury content. The exact historical derivation is uncertain.