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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Advanced tools, such as precise seafloor mapping to high-definition ROV imagery, allowed the researchers to explore and gather data from places never seen before by humans, Jyotika Virmani, executive director of the Schmidt Ocean Institute, said in a statement. Julia Jacobo, ABC News, 30 Oct. 2025 The gear, often connected to a trap on the seafloor and a buoy at the surface, can wrap itself around whales’ mouths, tails and bodies, leaving them struggling to feed and even swim. Erika I. Ritchie, Oc Register, 29 Oct. 2025 The seafloor had once been obscured beneath a thick ice shelf, but that changed in July 2017 when the massive A68 iceberg calved from the Larsen C Ice Shelf. Ashley Strickland, CNN Money, 29 Oct. 2025 The creatures are scavengers feeding on the seafloor and plankton as well as algae and waste particles. Ashley J. Dimella, FOXNews.com, 22 Oct. 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 7 Nov. 2025.

Kids Definition

seafloor

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

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