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The floor of the sea or the ocean.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
the ground under the sea
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the solid surface underlying a sea or ocean. Also called seabed.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||seabed - the bottom of a sea or ocean |
abyssal zone - the deep sea (2000 meters or more) where there is no light
bed, bottom - a depression forming the ground under a body of water; "he searched for treasure on the ocean bed"
continental shelf - the relatively shallow (up to 200 meters) seabed surrounding a continent
bathyal district, bathyal zone, continental slope - the steep descent of the seabed from the continental shelf to the abyssal zone
neritic zone - the ocean waters from the low tide mark to a depth of about 100 fathoms
twilight zone - the lowest level of the ocean to which light can reach
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