hadal

(hād′'l)

adjective

designating or of the ecological zone () of the ocean floor trenches below c. 3,300 fathoms (c. 6,000 m)

Origin: Fr < Hadès, Hades + -al, -al

See hadal in American Heritage Dictionary 4

adjective

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

Origin:

Origin: French

Origin: , from Hadès, Hades

Origin: , from Greek Haidēs; see weid- in Indo-European roots

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