/ Dictionary / Index B bradykinin: Meaning and Definition of Find definitions for: brad•y•kin•in Pronunciation: (brad"i-kin'in, -kī'nin), [key] — n. Biochem. a peptide hormone that dilates peripheral blood vessels and increases capillary permeability. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bradycardia bradytelic Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language