Aerugo
Pronunciation : ?*ru"go (
Part of Speech : n.
Etymology : [L. aes brass, copper.]
Definition : Defn: The rust of any metal, esp. of brass or copper; verdigris.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder