aerugo

noun ae·ru·go \ ēˈ-rü-(ˌ)gō , i- , ī- \

Definition of aerugo

plural -s
:the rust of a metal and especially brass or copper :verdigris

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Origin and Etymology of aerugo

Middle English erugo “mildew, plant rust,” borrowed from Medieval Latin, going back to Latin aerūgō “verdigris,” from aer-, aes “bronze, brass, copper” + -ūgō, suffix marking a surface layer or discoloration


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