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Definition of "phototaxis" [pho•to•tax•is]

  • The movement of an organism or a cell toward or away from a source of light. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "phototaxis" in a sentence
  • "This process, called phototaxis, was the focus of the PNAS study."
  • "Sexual isolation caused by selection for positive and negative phototaxis and geotaxis in Drosophila pseudoobscura."
  • "According to Sharp: Insects have a behavior phototaxis in which they tend to congregate in the vicinity of light having a wavelength in the ultraviolet range of around 350 nm."
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