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 Instead of needing a long buoy-line suspended in the water column for extended periods of time, the rope and buoy can be stored at the bottom of the seafloor or replaced with an inflatable bag. Francine Kershaw, The Mercury News, 9 Apr. 2024 Thousands of feet below the surface of the South China Sea, scientists aboard a submarine stared at the seafloor. Aspen Pflughoeft, Miami Herald, 28 Mar. 2024 But if the seafloor on Hycean worlds is made of ice, that would place important limits on how nutrients can flow from the rocky interior. Discover Magazine, 29 Feb. 2024 Using a deep-sea robot, UC Santa Barbara scientists discovered an eerie graveyard of leaking barrels in 2020, spread out on the seafloor near Santa Catalina Island. Ryan Fonseca, Los Angeles Times, 21 Feb. 2024 During its final journey, three internet cables laid on the seafloor in the Bab-el-Mandeb Strait were damaged. Matt Burgess, WIRED, 1 Apr. 2024 Concreted cannonballs from the HMS Tyger on the seafloor. Dennis Romero, NBC News, 16 Mar. 2024 For decades, a graveyard of corroding barrels has littered the seafloor just off the coast of Los Angeles. Rosanna Xia, Los Angeles Times, 21 Feb. 2024 Now — after more than 700 gray whales have washed ashore in Mexico, Canada, California and other U.S. states since late 2018 — new research published Tuesday in PLOS One suggests the culprit was a critical drop in food availability in the mammals’ Arctic and sub-Arctic seafloor feeding grounds. Susanne Rust, Los Angeles Times, 27 Mar. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'seafloor.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 24 Apr. 2024.

Kids Definition

seafloor

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

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