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archibenthos

[ahr-kuh-ben-thos]
noun
  1. the ocean bottom between the littoral and abyssal zones: from depths of approximately 200 feet (60 meters) to 3300 feet (1000 meters).
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Origin of archibenthos

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018