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noun Biology.
1.
the normal condition of sensitiveness to light in organisms or their organs.
2.
the irritability exhibited by cytoplasm when exposed to light of a certain intensity.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Link To phototonus
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Phototonus
is always a great word to know.
So is adaptation. Does it mean:
| any alteration in the structure of an organism resulting from natural selection, by which the organism becomes more able to survive in its environment |
| a mature sexual reproductive cell, such as a sperm or egg, that unites with another cell to form a new organism |
Collins
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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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary
phototonus pho·tot·o·nus (fō-tŏt'n-əs)
n.
The state of being sensitive to or irritated by light.
pho'to·ton'ic (fō'tə-tŏn'ĭk) 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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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Word Dynamo Rating For Phototonus
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