/ Dictionary / Index K keto: Meaning and Definition of Find definitions for: ke•to Pronunciation: (kē'tō), [key] — adj. Chem. of or derived from a ketone. keto- Pronunciation: [key] a combining form representingin compound words: ketolysis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ketene ketoconazole Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language