hadal

[ heyd-l ]

/ ˈheɪd l /

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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.

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Origin of hadal

First recorded in 1955–60; Had(es) + -al¹

Words nearby hadal

hacktivism, hacktivist, hackwork, Hacky Sack, had, hadal, Hadamard, Hadar, hadarim, Hadas, Hadassah

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use hadal in a sentence

They can operate autonomously, which they’ll do at the hadal depths, but can also work while connected to a tether.
These new robots will plunge into the ocean’s most alien depths|Erik Olsen|November 3, 2021|Popular-Science

British Dictionary definitions for hadal

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

Word Origin for hadal

C20: from French, from Hadés Hades

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for hadal

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).