/ Dictionary / Index M mycocecidium: Meaning and Definition of Find definitions for: my•co•ce•cid•i•um Pronunciation: (mī"kō-su-sid'ē-um), [key] — n. Mycol. a gall caused by a parasitic fungus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mycobiont mycoflora Related Content Daily Word Quiz: propriety Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language