uredo

noun
ure·​do | \yəˈrē(ˌ)dō\

Definition of uredo 

1 plural -s : the uredostage of a rust formerly regarded as a distinct genus

2 capitalized : a form genus of rusts including forms having either a uredostage only or having a uredostage together with pycnial and aecial stages

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History and Etymology for uredo

New Latin, from Latin, blast, blight, burning itch, from urere to burn

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