hadal

ha·dal  (hdl)

adj.

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

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

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hadal  (hdl)

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).

Thesaurus

Adj.

1.

hadal - relating to the deepest parts of the ocean (below 6000 meters)