variants
or less commonly sea floor
plural seafloors also sea floors
: the floor of a sea or ocean : seabed
The Earth's crust, in this view, is divided into several immense plates that make up the continents and seafloors, and that all float on a hot, plastic, subterranean "mantle."—
Walter Sullivan
Walter SullivanExamples of seafloor in a Sentence
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Critical metals on seafloor need careful study According to Thomas Dahlgren, a marine biologist at the University of Gothenburg and one of the project’s lead researchers, the global push for a green transition is intensifying demand for critical metals that are currently in short supply.
—Bojan Stojkovski, Interesting Engineering, 7 Dec. 2025
From 2014 to 2017, Malaysia, Australia and China searched 120,000 square kilometers of seafloor at a cost of roughly $155 million (more than $200 million today).
—Eric Sullivan, Scientific American, 3 Dec. 2025
Non-calcareous algae expanded as water became more acidic, with brown and red algae spread across the seafloor, enjoying the space and reduced competition.
—New Atlas, 29 Nov. 2025
The Doheny plant would be the first commercial-scale desalination project to use slant wells designed to collect ocean water from beneath the seafloor and pull it through sand, which eliminates risks to most sea life.
—Laylan Connelly, Oc Register, 26 Nov. 2025
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Bojan Stojkovski, Interesting Engineering, 7 Dec. 2025
From 2014 to 2017, Malaysia, Australia and China searched 120,000 square kilometers of seafloor at a cost of roughly $155 million (more than $200 million today).
—Eric Sullivan, Scientific American, 3 Dec. 2025
Non-calcareous algae expanded as water became more acidic, with brown and red algae spread across the seafloor, enjoying the space and reduced competition.
—New Atlas, 29 Nov. 2025
The Doheny plant would be the first commercial-scale desalination project to use slant wells designed to collect ocean water from beneath the seafloor and pull it through sand, which eliminates risks to most sea life.
—Laylan Connelly, Oc Register, 26 Nov. 2025
See All Example Sentences for seafloor
Cite this Entry
“Seafloor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seafloor. Accessed 13 Dec. 2025.
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