phyllotaxis

noun
phyl·​lo·​tax·​is | \ ˌfi-lə-ˈtak-səs How to pronounce phyllotaxis (audio) \
variants: or less commonly phyllotaxy \ ˈfi-​lə-​ˌtak-​sē How to pronounce phyllotaxy (audio) \

Definition of phyllotaxis

1 : the arrangement of leaves on a stem and in relation to one another
2 : the study of phyllotaxis and of the laws that govern it

First Known Use of phyllotaxis

1845, in the meaning defined at sense 1

History and Etymology for phyllotaxis

New Latin phyllotaxis, from phyll- + -taxis

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The first known use of phyllotaxis was in 1845

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Britannica.com: Encyclopedia article about phyllotaxis

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