/ Dictionary / Index F fusobacterium: Meaning and Definition of Find definitions for: fu•so•bac•te•ri•um Pronunciation: (fy"zō-bak-tēr'ē-um), [key] — pl. -te•ri•a any of several rod-shaped, anaerobic bacteria of the genus Fusobacterium, certain species of which are pathogenic in humans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fusion reactor fuss Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language