kinetinPronunciation: /ˈkʌɪnɪtɪn/Definition of kinetin noun [mass noun] a synthetic compound similar to kinin, used to stimulate cell division in plants. Origin: 1950s: from Greek kinetos 'movable' (from kinein 'to move') + -in1kinetin in other Oxford dictionaries Definition of kinetin in the US English dictionary