硫りゅう化か鉄てつMeaningsNoun1. iron sulfide; iron sulphideKanji used硫sulphur化transformation鉄ironPitch accentりゅうかてつComposed of硫りゅう化かsulfuration; sulphurationNoun鉄てつiron (Fe); steel; iron (will, discipline, lady, etc.); railwayNoun