from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. of or relating to phototaxis

from The Century Dictionary and Cyclopedia

  • In botany, pertaining to, characteristic of, or exhibiting phototaxis.
  • In biology, of or pertaining to the locomotion of organisms in relation to direction of light; exhibiting phototaxis or photopathy.


Sorry, no etymologies found.


  • Unlike other algae genera sequenced to date, these swift swimmers can cut through the water column at a rate of 50 body lengths per second, and are phototactic, meaning that they can swim towards the sunlight from which they derive their energy. - latest science and technology news stories

  • Isopods are negatively phototactic (reathey ct to light by moving away from it), and usually remain hidden under rocks and debris.


  • The results demonstrated that in free-swimming spheroids, only those cells of the anterior hemisphere that face toward the light source reverse the beating direction in the presence of illumination; this behavior results in phototactic turning.

    BioMed Central - Latest articles

  • Our results also indicate how recently evolved multicellular organisms adapted the phototactic capabilities of their unicellular ancestors to multicellular life.

    BioMed Central - Latest articles

  • On the basis of our results, we developed a mechanistic model that predicts the phototactic behavior in V. rousseletii.

    BioMed Central - Latest articles

  • In this study, the phototactic behavior in the spheroidal, multicellular volvocine green alga Volvox rousseletii (Volvocales, Chlorophyta) was analyzed.

    BioMed Central - Latest articles

  • Many moths are attracted to light (a condition known as being positively phototactic).

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  • Visual flight control wasps - effect ocelli phototactic orientation turning tendency

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  • Halobacterium species NRC-1, a phototrophic, phototactic, and UV-tolerant haloarchaeon.

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