/ Dictionary / Index W white rot: Meaning and Definition of Find definitions for: white' rot' Pronunciation: [key] a decay of wood caused by lignase-producing fungi, esp. Phanerochaete chrysosporium. a fungal disease of onions and related plants caused by Sclerotinia cepivorum. any of the several fungi causing white rot. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. white rose White Russia Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language