/ Dictionary / Index K karyogamy: Meaning and Definition of Find definitions for: kar•y•og•a•my Pronunciation: (kar"ē-og'u-mē), [key] — n. Cell Biol. the fusion of the nuclei of cells, as in fertilization. Cf. plasmogamy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. karyo- karyokinesis Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language