geotactic

adjective
geo·​tac·​tic | \ˌjē-ō-ˈtak-tik \

Definition of geotactic 

: of or relating to geotaxis

First Known Use of geotactic

1899, in the meaning defined above

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The first known use of geotactic was in 1899

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geotactic

adjective
geo·​tac·​tic | \ˌjē-ō-ˈtak-tik \

Medical Definition of geotactic 

: of or relating to geotaxis

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