[ sahy-tuh-kahy-nin ]
/ ˌsaɪ təˈkaɪ nɪn /

noun Biochemistry.

any of a class of plant hormones, produced by the roots and traveling upward through the xylem, that promote tissue growth and budding and, on application, retard plant senescence.
Compare kinetin, zeatin.

Origin of cytokinin

First recorded in 1960–65; cyto- + -kinin Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for cytokinin

/ (ˌsaɪtəʊˈkaɪnɪn) /


any of a group of plant hormones that promote cell division and retard ageing in plantsAlso called: kinin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for cytokinin

[ sī′tə-kīnĭn ]

Any of a class of plant hormones that promote cell division and growth and delay the senescence of leaves. Cytokinins are synthesized mainly in root tips.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.