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phototaxis

[foh-tuh-tak-sis] /ˌfoʊ təˈtæk sɪs/
noun, Biology
1.
movement of an organism toward or away from a source of light.
Also, phototaxy.
Origin
1900-1905
1900-05; photo- + -taxis
Related forms
phototactic
[foh-tuh-tak-tik] /ˌfoʊ təˈtæk tɪk/ (Show IPA),
adjective
phototactically, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for phototactic

phototaxis

/ˌfəʊtəʊˈtæksɪs/
noun
1.
the movement of an entire organism in response to light
Derived Forms
phototactic (ˌfəʊtəʊˈtæktɪk) adjective
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
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phototactic in Medicine

phototaxis pho·to·tax·is (fō'tō-tāk'sĭs)
n.
The movement of an organism or a cell toward or away from a source of light.


pho'to·tac'tic (-tāk'tĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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