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phototropic

[foh-tuh-trop-ik, -troh-pik] /ˌfoʊ təˈtrɒp ɪk, -ˈtroʊ pɪk/
adjective, Botany
1.
growing toward or away from the light.
2.
taking a particular direction under the influence of light.
Origin
1895-1900
1895-1900; photo- + -tropic
Related forms
phototropically, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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