phototaxis

noun
pho·to·tax·is | \ˌfō-tō-ˈtak-səs \

Definition of phototaxis 

: a taxis in which light is the directive factor

First Known Use of phototaxis

circa 1889, in the meaning defined above

History and Etymology for phototaxis

New Latin

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The first known use of phototaxis was circa 1889

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phototaxis

noun
pho·to·tax·is | \-ˈtak-səs \
plural phototaxes\-ˌsēz \

Medical Definition of phototaxis 

: a taxis in which light is the directive factor

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