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Meaning of abyssal zone in English:

abyssal zone

noun

Oceanography

  • The deep part of the ocean, now typically from a depth of 3000 metres (1.9 miles) down to 6000 metres (3.7 miles), though the numerical limits, especially the upper one, vary.

    The term originally referred to a depth of 100 fathoms (approx. 183 metres) down to the lowest depth at which life is possible.

Origin

Mid 19th century.