/ Dictionary / Index A alpha globulin: Meaning and Definition of Find definitions for: al'pha 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. alpha-fetoprotein alpha helix Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language