Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Of or relating to the deepest regions of the ocean, below about 6,000 meters (20,000 feet).

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective of, or relating to the deepest parts of the ocean

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective relating to the deepest parts of the ocean (below 6000 meters)

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[French, from Hadès, Hades, from Greek Haidēs; see weid- in Indo-European roots.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From French hadal, from Hadès + -al.

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Examples

  • Below six thousand meters lies a region known as the hadal zone (a term coined only in 1959 from the French Hadès); in the Marianas Trench off the Philippines it is 11,000 meters deep.

    Where Wonders Await Us Flannery, Tim 2007

  • They would have some hadal artifact for her to translate.

    Deeper Jeff Long 2007

  • He talked about doing a documentary, but I figured he was just another pirate looking for hadal gold.

    Deeper Jeff Long 2007

  • Your plague wiped out all their generations, the last of their memory, every last one of the hadal nations.

    Deeper Jeff Long 2007

  • In a sense, that incident had closed the book on hadal civilization.

    Deeper Jeff Long 2007

  • Then, suddenly, the hadal tribes had nowhere left to go.

    Deeper Jeff Long 2007

  • And the hadal prisoner pointed at one I had drawn on my face.

    Deeper Jeff Long 2007

  • And how else did you explain the presence of the same recurring glyphs and images and spirals carved in the walls leading to the most impressive buildings in each hadal city?

    Deeper Jeff Long 2007

  • At its height nine thousand years ago, the hadal empire had been a sort of dark paradise.

    Deeper Jeff Long 2007

  • At the edge of her hearing, she could almost distinguish soft syllables and bits of hadal click language.

    Deeper Jeff Long 2007

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