ring rot: Meaning and Definition of

ring' rot"

Pronunciation: [key]
— Plant Pathol. Plant Pathol.
  1. a disease of potatoes, characterized by wilted foliage and rotting of the ring of vascular bundles in the tubers, caused by a bacterium, Corynebacterium sepedonicum.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.