/ Dictionary / Index R rice blast: Meaning and Definition of Find definitions for: rice' blast" Pronunciation: [key] — Plant Pathol. Plant Pathol. a disease of rice caused by the fungus Pyricularia oryae, characterized by elliptical leaf spots with reddish-brown margins, brownish lesions and neck rot of the fruiting panicles, and stunting of the plant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ricebird rice coal Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language