root knot: Meaning and Definition of

root' knot"

Pronunciation: [key]
— Plant. Pathol.
  1. a disease of plants, characterized by galls or knots on the roots and stunted growth, caused by any of several nematodes of the genus Meloidogyne.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.