canker stain

noun

: a disease of plane trees caused by a fungus (Endoconidiophora fimbriata platani) and marked by bluish black or reddish brown discoloration which forms a radial pattern beneath elongate blackened cankers on the trunk and less frequently on the branches

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