hadal

(redirected from Hadal zone)
Also found in: Dictionary, Wikipedia.

hadal

[′hād·əl]
(oceanography)
Pertaining to the environment of the ocean trenches, over 4 miles (6.5 kilometers) in depth.
References in periodicals archive ?
The hadal zone extends from around six kilometers to the deepest seafloor.
13 The hadal zone is a termused for the lowest part of what?
When asked about the safety of sending people into the hadal zone -- the Hades zone, or depths greater than 6,000 m -- Hawkes replies, "the only sure way to be safe is to be dead.