/ Dictionary / Index B beta brass: Meaning and Definition of Find definitions for: be'ta brass" Pronunciation: [key] an alloy consisting of nearly equal proportions of copper and zinc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. beta blocker beta carotene Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language