Science Dictionary
aphotic   (ā-fō'tĭk)  Pronunciation Key 
  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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