heliotaxis
noun
he·lio·tax·is
ˌhē-lē-ō-ˈtak-səs 
plural heliotaxes
-ˌsēz
: a taxis in which sunlight is the directive factor
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“Heliotaxis.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/heliotaxis. Accessed 17 Dec. 2024.
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