orange leaf rust

noun

: a rust of wheat and other grasses caused by a fungus (Puccinia triticina), characterized by orange-colored pustules on the leaves, resulting in decreased yield and quality of grain, and involving as alternate host of the parasite a meadow rue or related plant

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Dictionary Entries Near orange leaf rust

Cite this Entry

“Orange leaf rust.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/orange%20leaf%20rust. Accessed 28 Mar. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!