/ Dictionary / Index H heterokaryosis: Meaning and Definition of Find definitions for: het•er•o•kar•y•o•sis Pronunciation: (het"ur-u-kar"ē-ō'sis), [key] — n. Biol. condition in which a binucleate or multinucleate cell contains genetically dissimilar nuclei. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heterokaryon heterolecithal Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language