/ Dictionary / Index B bradycardia: Meaning and Definition of Find definitions for: brad•y•car•di•a Pronunciation: (brad"i-kär'dē-u), [key] — n. Med. a slow heartbeat rate, usually less than 60 beats per minute. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bradycardia (Thesaurus) Brady bradykinin Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language