hadal
hadal definition
ha·dal (hād′'l)
adjective
designating or of the ecological zone (hadal zone) of the ocean floor trenches below c. 3,300 fathoms (c. 6,000 m)
Etymology: Fr < Hadès, Hades + -al, -al
Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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