red rust

noun

1

: the uredinial stage of a rust

2

: the diseased condition produced by red rust

Examples of red rust in a Sentence

Recent Examples on the Web

From Californian poppy orange and Granny Smith green to flame red rust, even the more muted colors — think buttermilk yellow and gentle olive — make an impact. —Georgia Murray, refinery29.com, 5 Feb. 2021

Iron oxides, the same compounds that create brown and red rust, are turning icebergs emerald. —David Grossman, Popular Mechanics, 7 Mar. 2019

Word History

First Known Use

1806, in the meaning defined at sense 1