clubroot

/K L AH1 B R UW1 T/
noun
  1. 1

    A common disease of cabbages, radishes, turnips and other plants of the Cruciferae, caused by Plasmodiophora brassicae, in which galls form on latent roots, rendering them clublike.

  2. 2

    A root thus affected.

Source: https://en.wiktionary.org/wiki/clubroot