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

Word History


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

First Known Use

1664, in the meaning defined above

Time Traveler
The first known use of aerugo was in 1664

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Dictionary Entries Near aerugo

Cite this Entry

“Aerugo.” Dictionary, Merriam-Webster, Accessed 27 May. 2024.

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