/ Dictionary / Index B blue stain: Meaning and Definition of Find definitions for: blue' stain' Pronunciation: [key] — Plant Pathol. Plant Pathol. a serious fungal disease of certain trees that reduces the economic value of the timber, caused by various species of the genus Ceratocystis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. blues-rock blue stellar object Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language