/ Dictionary / Index B bch.: Meaning and Definition of Find definitions for: bch. Pronunciation: [key] — pl. bchs. bunch. B.Ch. Pronunciation: [key] Bachelor of Chemistry. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. BCG vaccine B.Ch.E. 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