Verdigris is a greenish-blue substance that forms on the metals copper, brass, and bronze after they have been left in wet or damp conditions.
N-UNCOUNT
Verdigris is a greenish-blue substance that forms on the metals copper, brass, and bronze after they have been left in wet or damp conditions.
N-UNCOUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012