rubigo

From Latin rūbīgō.

• IPA^(key): /ɹuːˈbaɪɡəʊ/

rubigo (uncountable)

1. (phytopathology, obsolete) rust (fungal disease of plants)
   • 1804, Annals of agriculture and other useful arts:

     Dr. Darwin supposes that the rubigo which shows itself in a ferruginous powder beneath the leaves of vegetables previously diseased, may be a fungus (like the eurisiphe or mildew) […]

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

• Burgio, gourbi

rūbīgō f (genitive rūbīginis); third declension (proscribed)

1. alternative form of rōbīgō (“rust”)
   • [3rd–4th century, Appendix Probi, line 187:

     robigo non rubigo

     (The correct form is) robigo, not rubigo]

Third-declension noun.

• “rubigo”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “rubigo”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• rubigo in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.