These are two different words. The green that forms on copper is called copper oxide. This is referred to as "patina." Middle English Latin term "aerugo" referred to the patina. http://www.latin-dictionary.net/search/latin/aerugo "Erugo" is a Latin term meaning to that means to take the wrinkles from. It is conjugated erugo, erugare, erugavi, erugatus. http://www.latin-dictionary.net/definition/19339/erugo-erugare-erugavi-erugatus
These are two different words. The green that forms on copper is called copper oxide. This is referred to as "patina." Middle English Latin term "aerugo" referred to the patina. http://www.latin-dictionary.net/search/latin/aerugo "Erugo" is a Latin term meaning to that means to take the wrinkles from. It is conjugated erugo, erugare, erugavi, erugatus. http://www.latin-dictionary.net/definition/19339/erugo-erugare-erugavi-erugatus
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