/ Dictionary / Index B blood sugar: Meaning and Definition of Find definitions for: blood' sug"ar Pronunciation: [key] glucose in the blood. the quantity or percentage of glucose in the blood. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bloodsucker blood test 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