hadal

[ heyd-l ]
/ ˈheɪd l /

adjective

of or relating to the greatest ocean depths, below approximately 20,000 feet (6500 meters).
of or relating to the biogeographic region of the ocean bottom below the abyssal zone.

Origin of hadal

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

Words nearby hadal

had its day, has, had one's fill, had rather, had we but world enough, and time, / this coyness, lady, were no crime, had, to be, hadal, hadamard, hadar, hadarim, hadas, hadassah

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

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).