/ Dictionary / Index B bacterin: Meaning and Definition of Find definitions for: bac•ter•in Pronunciation: (bak'tu-rin), [key] — n. Immunol. a vaccine prepared from killed bacteria. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bactericide bacterio- 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