white rust

noun

Definition of white rust

: any of various diseases of chiefly cruciferous plants caused by a fungus (genus Albugo) and marked by white spore-filled lesions also : a fungus causing white rust

First Known Use of white rust

1815, in the meaning defined above

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The first known use of white rust was in 1815

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Cite this Entry

“White rust.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/white%20rust. Accessed 22 Sep. 2020.

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