/ Dictionary / Index B Bactra: Meaning and Definition of Find definitions for: Bac•tra Pronunciation: (bak'tru), [key] — n. ancient name of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bacteroides Bactria Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language