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photokinesis

[foh-toh-ki-nee-sis, -kahy-]
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noun Physiology.
  1. movement occurring upon exposure to light.
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Origin of photokinesis

First recorded in 1900–05; photo- + -kinesis
Related formspho·to·ki·net·ic [foh-toh-ki-net-ik, -kahy-] /ˌfoʊ toʊ kɪˈnɛt ɪk, -kaɪ-/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for photokinesis

photokinesis

noun
  1. biology the movement of an organism in response to the stimulus of light
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Derived Formsphotokinetic (ˌfəʊtəʊkɪˈnɛtɪk, -kaɪ-), adjectivephotokinetically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012