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epipelagic

[ep-ee-puh-laj-ik]
adjective
  1. of or relating to the stratum of the oceanic zone where enough light is present for photosynthesis to occur.
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Origin of epipelagic

First recorded in 1935–40; epi- + pelagic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for epipelagic

epipelagic

adjective
  1. of, relating to, or inhabiting the upper zone of the ocean from just below the surface to approximately 100 metres deep
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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