/ Dictionary / Index R ring spot: Meaning and Definition of Find definitions for: ring' spot" Pronunciation: [key] — Plant Pathol. Plant Pathol. any of various plant diseases caused by a virus or fungus and characterized by concentric rings of discoloration or necrosis on the leaves. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ring-spinning frame ringster Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language