Having the green or bluish-green color of copper or bronze oxidized by exposure to air (verdigris), or containing copper compounds.
From Latin aerugo (verdigris, the green patina on copper). The Latin term comes from aes (copper/bronze), evolving to describe the distinctive coloration that forms when copper oxidizes.
The Statue of Liberty's iconic green color is aeruginous—pure copper underneath turned blue-green by air and sea spray over 130+ years, creating a protective layer that actually prevents further rust, making the coating both beautiful and functional.
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