ferrugo

Borrowed from Latin ferrūgō (“iron rust”), from ferrum (“iron”).

ferrugo (uncountable)

1. (phytopathology) rust (plant disease).

• ferruginous

• “ferrugo”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

From ferrum (“iron”) +‎ -ūgō.

• (Classical Latin) IPA^(key): [fɛrˈruː.ɡoː]
• (modern Italianate Ecclesiastical) IPA^(key): [ferˈruː.ɡo]

ferrūgō f (genitive ferrūginis); third declension

1. rust (or the colour), specifically iron-rust or its colour

Third-declension noun.

• ferrūmen

• “ferrugo”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “ferrugo”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• "ferrugo", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• ferrugo in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• “ferrūgō” on page 691/1 of the Oxford Latin Dictionary (1st ed., 1968–82)
• Walther von Wartburg (1928–2002) “ferrugo”, in Französisches Etymologisches Wörterbuch, volume 3: D–F, page 470
• Meyer-Lübke, Wilhelm (1911) “ferrugo”, in Romanisches etymologisches Wörterbuch (in German), page 245