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hadal
[ heyd-l ]
adjective
, Oceanography.
- of or relating to the greatest ocean depths, below approximately 20,000 feet (6,500 meters).
- of or relating to the biogeographic region of the ocean bottom below the abyssal zone.
hadal
/ ˈheɪdəl /
adjective
- of, relating to, or constituting the zones of the oceans deeper than abyssal: below about 6000 metres (18 000 ft) See also abyssal
hadal
/ hād′l /
- Relating to the deepest regions of the ocean, below about 6,000 m (19,680 ft). The hadal zone mostly comprises trenches that can reach depths greater than 10,000 m (32,800 ft).
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Word History and Origins
Origin of hadal1
C20: from French, from Hadés Hades
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Example Sentences
They can operate autonomously, which they’ll do at the hadal depths, but can also work while connected to a tether.
From Popular-Science
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