/ Dictionary / Index K kinetin: Meaning and Definition of Find definitions for: ki•ne•tin Pronunciation: (kī'ni-tin), [key] — n. Biochem. a synthetic cytokinin, CHON, that retards senescence in plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. kinetic theory of matter kineto- Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language