/ Dictionary / Index R root rot: Meaning and Definition of Find definitions for: root' rot" Pronunciation: [key] — Plant Pathol. Plant Pathol. a symptom or phase of many diseases of plants, characterized by discoloration and decay of the roots. any disease so characterized. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. root pressure Roots blower Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language