/ Dictionary / Index D dry rot fungus: Meaning and Definition of Find definitions for: dry' rot' fun"gus Pronunciation: [key] a fungus, Merulius lacrymans, that causes a common type of dry rot. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dry rot dry run Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language