white mold

noun

1

: cottony rot

2

: any of several diseases of plants that resemble cottony rot and are caused by fungi especially of the genus Ramularia or Erostrotheca

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now