/ Dictionary / Index K karyo-: Meaning and Definition of Find definitions for: karyo- Pronunciation: [key] a combining form meaning “nucleus of a cell,” used in the formation of compound words: karyotin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Karyn karyogamy 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