seafloor

noun

sea·​floor ˈsē-ˌflȯr How to pronounce seafloor (audio)
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

Examples of seafloor in a Sentence

Recent Examples on the Web
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The animals are not aliens, but giant pile worms, large marine worms that are typically found on the seafloor, but will swarm at the water’s surface to mate, Benjamin Neal, biologist and assistant teaching professor at the University of Victoria, told Saanich News. Irene Wright, Miami Herald, 12 Feb. 2025 And not everyone is convinced that the presence of scaly skin means plesiosaurs were hanging out on the seafloor. Sarah Kuta, Smithsonian Magazine, 7 Feb. 2025 Researchers theorize the textured flippers allowed the animal to better move along the seafloor while hunting for prey, and the smoother portions reduced drag while swimming. Andrew Paul, Popular Science, 6 Feb. 2025 Fertilized eggs turn into coral larvae — tiny and squishy free-swimming organisms — which eventually settle on the seafloor. Benji Jones, Vox, 4 Feb. 2025 See all Example Sentences for seafloor 

Word History

First Known Use

1853, in the meaning defined above

Time Traveler
The first known use of seafloor was in 1853

Dictionary Entries Near seafloor

Cite this Entry

“Seafloor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seafloor. Accessed 20 Feb. 2025.

Kids Definition

seafloor

noun
sea·​floor -ˌflō(ə)r How to pronounce seafloor (audio)
-ˌflȯ(ə)r
: seabed

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