/ Dictionary / Index M mycovirus: Meaning and Definition of Find definitions for: my•co•vi•rus Pronunciation: (mī'kō-vī"rus), [key] — pl. -rus•es. any fungus-infecting virus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mycotrophy mydriasis Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language