Definition of photic in English:

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Pronunciation: /ˈfōdik/


1Relating to light, especially as an agent of chemical change or physiological response.
Example sentences
  • To characterize this photic entrainment we examined frq expression in constant light, under which condition the mRNA and protein of this clock gene were strongly induced.
  • Furthermore, extraretinal photoreceptors appear to be involved in the photic entrainment of the circadian clock.
  • They are therefore true deep-brain photoreceptors that bypass the eyes as a pathway for photic information.
1.1 Ecology Denoting the layers of the ocean reached by sufficient sunlight to allow plant growth: an average depth for the photic zone is about 300 feet
More example sentences
  • Seasonal highs that pushed this euxinic layer into the photic zone would then lead to the greatly increased preservation and the TOC maxima.
  • Macroalgae benefit from this relationship because fertile drift plants are retained in the photic zone where they continue to contribute to the gene pool.
  • The authors skimmed their bacteria samples from the top, or photic layer, of the Mediterranean and Red Seas.

For editors and proofreaders

Syllabification: pho·tic

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