/ Dictionary / Index B black rot: Meaning and Definition of Find definitions for: black' rot' Pronunciation: [key] — Plant Pathol. Plant Pathol. any of several diseases of fruits and vegetables, characterized by black discoloration and decay of affected parts, caused by fungi, as Guignardia bidwellii, or bacteria, as Xanthomonas campestris. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. black root rot black rudderfish Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language