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aphotic

[ey-foh-tik] /eɪˈfoʊ tɪk/
adjective
1.
lightless; dark.
Origin
1900-1905
1900-05; a-6 + photic
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for aphotic
  • They are particularly curious about animals with large eyes that live on the bottom of the seafloor in the aphotic zone.
  • Below this, in the aphotic zone, the available light is too weak to support a significant amount of photosynthetic production.
British Dictionary definitions for aphotic

aphotic

/əˈfɒtɪk/
adjective
1.
characterized by or growing in the absence of light an aphotic plant
2.
of or relating to the zone of an ocean below that to which sunlight can penetrate, usually about 90m (300 ft). This is the lowest level at which photosynthesis can take place
Word Origin
C20: from a-1 + -photic, from Greek phōs light
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
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Word Origin and History for aphotic
aphotic
"untouched by sunlight, lightless" (in ref. to deep-sea regions), 1903, Mod.L., from Gk. a- "not, without" + phos (gen. photos) "light," related to phainein "to show, to bring to light" (see phantasm). Aphotic zone is recorded from 1913.
Online Etymology Dictionary, © 2010 Douglas Harper
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aphotic in Science
aphotic
  (ā-fō'tĭk)   
  1. Having no light.

  2. Relating to the region of a body of water that is not reached by sunlight and in which photosynthesis is unable to occur. Compare photic.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Difficulty index for aphotic

Few English speakers likely know this word

Word Value for aphotic

14
15
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