/ Dictionary / Index B BCG vaccine: Meaning and Definition of Find definitions for: BCG vaccine Pronunciation: [key] — Immunol. Immunol. a vaccine made from weakened strains of tubercle bacilli, used to produce immunity against tuberculosis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. B.Cer.E. bch. Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language