HCMa greenish-blue substance that sometimes appears on copper or brass 〔铜器上的〕铜绿
Examples from the Corpus
verdigris• Many displayed the malign green of corruption, the verdigris of spiritual gangrene.• The latter needed a polish, having become tarnished and covered with verdigris.
Originverdigris
(1300-1400)Old Frenchvert de Grice“green of Greece”