Definition of photic in English:


Syllabification: pho·tic
Pronunciation: /ˈfōtik


  • 1Of or relating to light, especially as an agent of chemical change or physiological response.
    More 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.

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