らいこう 雷汞 LinksSentence search for 雷汞Sentence search for らいこうSentence search for 雷こうKanji details for 雷 and 汞Edit in JMdict Noun1. mercury fulminateSee also 雷酸水銀Other forms雷こう 【らいこう】 Discussions Log in to talk about this word.