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photic

[ foh-tik ]

adjective

  1. of or relating to light.
  2. pertaining to the generation of light by organisms, or their excitation by means of light.


photic

/ ˈfəʊtɪk /

adjective

  1. of or concerned with light
  2. biology of or relating to the production of light by organisms
  3. Alsophotobathic designating the zone of the sea where photosynthesis takes place
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


photic

/ tĭk /

  1. Of or relating to light.
  2. Penetrated by or receiving light.
  3. Relating to the layer of a body of water that is penetrated by sufficient sunlight for photosynthesis. The depth of the photic zone is dependent on the clarity of the water and the amount and intensity of direct sunlight, although it does not usually exceed 200 m.
  4. Also called euphotic
  5. Compare aphotic


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Word History and Origins

Origin of photic1

1835–45; < Greek phōt- ( phot ) + -ic
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Word History and Origins

Origin of photic1

C19: from photo- + -ic
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Example Sentences

In these cases the photic stimulus produces partly chemical and partly mechanical changes.

The latent period of photic reaction is shortened with the increasing intensity of light.

I reproduce below two records of the effects of continuous photic and electric stimulation.

The tropic curve under geotropic stimulus is similar to that under photic stimulus.

I shall describe a device which gives a continuous record of photic variation for the whole day.

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photalgiaphotics