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hadal zone

American  
[hay-duhl zohn] / ˈheɪ dəl ˈzoʊn /

noun

  1. the deepest region of the ocean, which is found within ocean trenches and begins at depths greater than about 6,000 m (19,680 ft).


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Finally, there are the incredibly deep seafloor trenches known as the hadal zone, named after Hades, Greek god of the underworld.

From Scientific American • Aug. 6, 2022

Since then, Dr Cui has set his eyes on the hadal zone in general, and in particular on the bottom of the Mariana trench.

From Economist • Aug. 25, 2016

The hadal zone is one of the most poorly studied habitats on Earth.

From Nature • Mar. 17, 2016

Such landers are the only tools currently available to explore the hadal zone — and they are no substitute for submersibles, says Jeffrey Drazen, a deep-sea researcher at the University of Hawaii at Manoa.

From Nature • Dec. 8, 2015

"The hadal zone is 45% of the ocean's depth range. So the entire discipline of deep sea biology has concentrated on the shallowest 50% and that seems wrong," he said.

From BBC • Jul. 16, 2014

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