C2 noun /ˈvɜːrdɪɡriːs/
verdigris
緑青
Meaning
A green or bluish deposit that forms on copper, brass, or bronze surfaces due to oxidation.
Example
The old statue was covered in verdigris after years of exposure to the rain.
古い像は長年の雨にさらされた後、緑青で覆われていた。