[mass noun]green crystals of hydrated ferrous sulphate, especially as an industrial product (尤指作为工业产品的)(水)绿矾;硫酸亚铁
语源
late Middle English coperose, from Old French couperose, from medieval Latin cuperosa, literally 'flower of copper', from late Latin cuprum (see copper) + rosa 'rose', translating Greek khalkanthon