cytokinin

noun
cy·​to·​ki·​nin | \ˌsī-tə-ˈkī-nən \

Definition of cytokinin 

: any of various plant growth substances (such as kinetin) that are usually derivatives of adenine

First Known Use of cytokinin

1965, in the meaning defined above

History and Etymology for cytokinin

cyt- + kinin

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The first known use of cytokinin was in 1965

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cytokinin

noun
cy·​to·​ki·​nin | \ˌsīt-ə-ˈkī-nən \

Medical Definition of cytokinin 

: any of various plant growth substances that are usually derivatives of adenine

More from Merriam-Webster on cytokinin

Britannica.com: Encyclopedia article about cytokinin

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