/ Dictionary / Index B beta globulin: Meaning and Definition of Find definitions for: be'ta glob'ulin Pronunciation: [key] a blood plasma protein that is separable from other globulins by electrophoresis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. betagalactosidase beta-indoleacetic acid Related Content Daily Word Quiz: philately Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language