[foh-toh-ki-nee-sis, -kahy-]

noun Physiology.

movement occurring upon exposure to light.

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for photokinesis



biology the movement of an organism in response to the stimulus of light
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