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photokinesis

American  
[foh-toh-ki-nee-sis, -kahy-] / ˌfoʊ toʊ kɪˈni sɪs, -kaɪ- /

noun

Physiology.

  1. movement occurring upon exposure to light.

photokinesis British  
/ -kaɪ-, -kaɪ-, ˌfəʊtəʊkɪˈniːsɪs, ˌfəʊtəʊkɪˈnɛtɪk /

noun

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

"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

Other Word Forms

  • photokinetic adjective
  • photokinetically adverb

Etymology

Origin of photokinesis

First recorded in 1900–05; photo- + -kinesis

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.