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pho·to·tax·is | \ ˌfō-tō-ˈtak-səs 
\
\Definition of phototaxis
: a taxis in which light is the directive factor
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phototaxis
nounpho·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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Time Traveler for phototaxis
The first known use of phototaxis was circa 1889
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