uredinium

noun ure·din·i·um \ˌyu̇r-ə-ˈdi-nē-əm\

plural -ia \-nē-ə\

Definition of UREDINIUM

: a usually reddish or black mass of hyphae and spores of a rust fungus forming pustules that rupture the host's cuticle

— ure·din·i·al \-nē-əl\ adjective

New Latin, from Latin uredin-, uredo burning, blight, from urere to burn — more at ember

First Known Use: 1905

Next Word in the Dictionary: uredinoidPrevious Word in the Dictionary: UrediniopsisAll Words Near: uredinium

What made you want to look up uredinium? Please tell us where you read or heard it (including the quote, if possible).

Put-downs with flair

How to use a word that (literally) drives some people nuts.

Test your vocab with our fun, fast game

Ailurophobia, and 9 other unusual fears