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seafloor

[see-flawr, -flohr] /ˈsiˌflɔr, -ˌfloʊr/
noun
1.
the solid surface underlying a sea or an ocean.
Also called seabed.
Origin
1850-1855
1850-55; sea + floor
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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