緑礬 りょくばん Meanings Noun melanterite (FeSO4-7H2O) Kanji 緑 green. Read as リョク. 礬 alum. Read as バン. Example sentences 硫酸は古くは「緑礬油」と呼ばれていた。Sulphuric acid was formally referred to as Melanterite oil. Jinuma: Japanese Dictionary · Word lists