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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Ocean secrets Corals appear stationary, permanently anchored to rocks or other surfaces on the seafloor. Katie Hunt, CNN, 1 Feb. 2025 Some are near cold seeps – where hydrocarbons trapped beneath the seafloor escape upwards in columns of bubbles. Michael Loria, USA TODAY, 31 Jan. 2025 During one of their dives, researchers noticed an unfamiliar-looking sea cucumber resting on the seafloor about 3.5 miles deep, the study said. Aspen Pflughoeft, Miami Herald, 31 Jan. 2025 So, Vanguard, as well as the future Sentinel, will also have backup power sufficient to provide 96 hours of life support, in an external, adjacent pod on the seafloor. IEEE Spectrum, 31 Dec. 2024 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 11 Feb. 2025.

Kids Definition

seafloor

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

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