/ Dictionary / Index H heterokaryon: Meaning and Definition of Find definitions for: het•er•o•kar•y•on Pronunciation: (het"ur-u-kar'ē-on", -un), [key] — pl. -kar•y•a a cell containing two or more nuclei of differing genetic constitutions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heterogynous heterokaryosis 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