Meaning of VERDIGRIS in English

VERDIGRIS

ver ‧ di ‧ gris /ˈvɜːdəɡriː, ˈvɜːdɪɡriː, -ɡriːs $ ˈvɜːr-/ BrE AmE noun [uncountable]

[ Date: 1300-1400 ; Language: Old French ; Origin: vert de Grice 'green of Greece' ]

a greenish-blue substance that sometimes appears on ↑ copper or ↑ brass

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.