florigen

noun

flo·​ri·​gen ˈflȯr-ə-jən 

: a hormone or hormonal agent that promotes flowering

florigenic

ˌflȯr-ə-ˈje-nik 

adjective

Word History

Etymology

borrowed from Russian florigen, from flori- flori- + -gen -gen

Note: The Russian term was apparently introduced by the Soviet Armenian plant physiologist Mixail Xristoforovič Čajlaxjan (1902-91) in an article published in 1936 in the Doklady Akademii Nauk SSSR/Comptes rendus de l'Académie des Sciences de l'URSS. An English version of the article, entitled "New facts in support of the hormonal theory of plant development," was published in vol. 13 (1936) of the Doklady, pp. 79-83.

First Known Use

1936, in the meaning defined above