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 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 Image showing concreted cannonballs on the seafloor. Stephen Smith, CBS News, 15 Mar. 2024 Curled up on the black seafloor, defensively wrapped in their tentacles and facing sucker-side out, the cephalopod mothers had chosen this location strategically. Christian Thorsberg, Smithsonian Magazine, 31 Jan. 2024 The winning entries in this year’s Underwater Photographer of the Year contest have just been announced, and Alex Dawson was named Underwater Photographer of the Year 2024 for his image of a whale skeleton on the seafloor, beneath the ice, in Greenland. Alan Taylor, The Atlantic, 20 Feb. 2024 Since the 1960s, Russia and the United States have trained dolphins, seals and other marine mammals to assist their naval forces by tagging enemy divers, detecting mines and recovering items from the seafloor. Carolyn Wells, Longreads, 16 Jan. 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 19 Apr. 2024.

Kids Definition

seafloor

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

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