noun
: a salt NiSO 4 obtained usually as the green or blue crystalline hexahydrate and used chiefly in nickel-plating baths — called also single nickel salt
noun
: a salt NiSO 4 obtained usually as the green or blue crystalline hexahydrate and used chiefly in nickel-plating baths — called also single nickel salt
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012