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.

Origin of photic

1835–45; < Greek phōt- (see phot) + -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for photic

Historical Examples of photic


British Dictionary definitions for photic

photic

adjective
  1. of or concerned with light
  2. biology of or relating to the production of light by organisms
  3. Also: photobathic designating the zone of the sea where photosynthesis takes place

Word Origin for photic

C19: from photo- + -ic
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

Word Origin and History for photic
adj.

1843, "pertaining to light;" 1899, "pertaining to the parts of the ocean penetrated by sunlight," from Greek phot-, comb. form of Greek phos "light" (related to phainein "to show, to bring to light;" see phantasm) + -ic.

Online Etymology Dictionary, © 2010 Douglas Harper

photic in Medicine

photic

[fōtĭk]
adj.
  1. Of or relating to light.
  2. Penetrated by or receiving light.
  3. Designating or relating to the layer of a body of water that is penetrated by sufficient sunlight for photosynthesis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

photic in Science

photic

[fōtĭk]
  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. Also called euphotic Compare aphotic.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.