/ Dictionary / Index B bacteroid: Meaning and Definition of Find definitions for: bac•te•roid Pronunciation: (bak'tu-roid"), [key] — n. any of the rod-shaped or branched bacteria in the root nodules of nitrogen-fixing plants. —adj. resembling bacteria. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bacteroid (Thesaurus) bacterize bacteroides Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language