phototaxis

[foh-tuh-tak-sis]

pho·to·tax·is

[foh-tuh-tak-sis]
noun Biology.
movement of an organism toward or away from a source of light.
Also, pho·to·tax·y.


Origin:
1900–05; photo- + -taxis

pho·to·tac·tic [foh-tuh-tak-tik] , adjective
pho·to·tac·ti·cal·ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To phototaxis

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Phototaxis is always a great word to know.
So is life history. Does it mean:
profound change in form from one stage to the next in the life of an organism, as from the caterpillar to the pupa and then to the adult butterfly
the series of living phenomena exhibited by an organism in the course of its development from inception to death
Collins
World English Dictionary
phototaxis or phototaxy (ˌfəʊtəʊˈtæksɪs)
 
n
the movement of an entire organism in response to light
 
phototaxy or phototaxy
 
n
 
phototactic or phototaxy
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary

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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