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seafloor

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WordReference Random House Unabridged Dictionary of American English © 2026

sea•floor n.

Oceanographythe solid surface underlying a sea or an ocean. Also called seabed.

sea + floor 1850–55

'seafloor' also found in these entries (note: many are not synonyms or translations):

mid-ocean ridge - plate tectonics - rift valley - seabed - transform fault

Forum discussions with the word(s) "seafloor" in the title:

Microscopic organisms settle to the seafloor

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