gray mold

variants: or less commonly gray mold rot

Definition of gray mold

1a : any of various fungal diseases of fruits, vegetables, or herbaceous plants characterized by a grayish color of the affected surfaces
b : a fungus causing such a disease (as members of the genera Botrytis and Cercospora)
2 : downy mildew of the grape

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!

Learn More About gray mold

Dictionary Entries Near gray mold

gray Minyan ware

gray mold

gray moss

See More Nearby Entries 

Statistics for gray mold

Cite this Entry

“Gray mold.” Dictionary, Merriam-Webster, Accessed 3 Jul. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Which Word Does Not Belong?

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
True or False

Test your knowledge - and maybe learn something along the way.

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

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