ring rot

noun

Definition of ring rot

1 : decay in a log following closely the annual rings
2a : a disease of sweet potatoes caused by a fungus (Rhizopus stolonifer) in which the roots are girdled by bands of dry rot
b : a disease of potatoes caused by a bacterium (Clavibacter michiganensis sepedonicus synonym Corynebacterium michiganensis sepedonicus) and characterized by browning of the ring of vascular bundles

called also ring disease

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 ring rot

Statistics for ring rot

Cite this Entry

“Ring rot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ring%20rot. Accessed 23 Sep. 2020.

Comments on ring rot

What made you want to look up ring rot? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Homophone Quiz

  • three bears two of them look like theyre whispering to a third bear who looks chuffed to be the center of attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

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