phototaxis

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
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Collins
World English Dictionary
phototaxis or phototaxy (ˌfəʊtəʊˈtæksɪs) [Click for IPA pronunciation guide]
 
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
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00:10
Phototaxis is always a great word to know.
So is quincunx. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a fool or simpleton; ninny.
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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