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

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Another theory is that the mako may have ventured unusually close to the seafloor, where the octopus could have mistaken it for a rock or another surface to hide on. Melissa Cristina Márquez, Forbes.com, 1 Apr. 2025 The seafloor beneath, previously covered by 209 square miles of ice, had never before been accessible to humans. Julia Jacobo, ABC News, 31 Mar. 2025 The goal was to document a seafloor famously lush in seagrass, corals, turtles, dugongs, rays and sharks. Ian Urbina, Los Angeles Times, 28 Mar. 2025 Scientists onboard the Schmidt Ocean Institute’s research vessel Falkor (too) sailed to Antarctica to study the nearby seafloor, the creatures that live there and the way climate change is affecting Antarctic ice and the ecosystems that evolved around it. Ashley Balzer Vigil, Scientific American, 21 Mar. 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 12 Apr. 2025.

Kids Definition

seafloor

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

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