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from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of, relating to, or being the uppermost layer of a body of water that receives sufficient light for photosynthesis and the growth of green plants.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Describing that part of the near-surface ocean in which photosynthesis is possible


eu- +‎ photic (Wiktionary)



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