/ Dictionary / Index B bigeminy: Meaning and Definition of Find definitions for: bi•gem•i•ny Pronunciation: (bī-jem'u-nē), [key] — n. Med. the occurrence of premature atrial or ventricular heartbeats in pairs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Big Dipper big enchilada 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