雷汞 léigǒng mercury fulminate Origin Definitions Defs Strokes Stroke Words Sentences Sents 雷 léi abbreviation of 雷酸汞 léisuāngǒng mercury fulminate primary explosive used in percussion caps and blasting caps汞 gǒng noun mercury mercury (element Hg); a toxic, silver-white liquid metal also called 水银 shuǐyín