noun ae·ru·go \ēˈ-rü-(ˌ)gō, i-, ī-\

Definition of aerugo



  1. :  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 — more at 1ore

First Known Use: 1664

Seen and Heard

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to criticize severely

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