- the solid surface underlying a sea or an ocean.
Origin of seafloor
Also called seabed.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for sea-floor
They had ropes, and in seconds they'd lashed us down to the sea-floor.Under Arctic Ice
The darkness on the sea-floor was too thick, the wavering shadows too deceptive.Seed of the Arctic Ice
H. G. Winter
The sea-floor is transformed when it enters into the new element.Applied Psychology for Nurses
Mary F. Porter
Annelids left their traces in burrows and casts on the sea-floor (Arenicolites, Cruziana, Scolithus, &c.).
But it is difficult to believe that the sea-floor could have subsided to such an extent in recent times.Fragments of Earth Lore
Word Origin and History for sea-floor
Online Etymology Dictionary, © 2010 Douglas Harper