/ Dictionary / Index M mycobiont: Meaning and Definition of Find definitions for: my•co•bi•ont Pronunciation: (mī"kō-bī'ont), [key] — n. the fungal component of a lichen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mycobacterium mycocecidium Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language