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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Oregon State University Chadwick and colleagues at the University of Washington and the University of North Carolina Wilmington have been using a network of sensors on the seafloor to eavesdrop on the volcano. Denise Chow, NBC news, 8 May 2025 If and when companies will be able to get machines on the seafloor is far from clear. Laura Paddison, CNN Money, 8 May 2025 Last month, Alvin made a series of dives on the East Pacific Rise far to the west of Costa Rica to study one of the most active hydrothermal vent seafloor areas in the world. Gary Robbins, San Diego Union-Tribune, 8 May 2025 According to the research, humans have observed less than 0.001% of the deep seafloor—an area roughly the size of Rhode Island. Simmone Shah, Time, 7 May 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

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Cite this Entry

“Seafloor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seafloor. Accessed 19 May. 2025.

Kids Definition

seafloor

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

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