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seafloor

American  
[see-flawr] / ˈsiˌflɔr /
Or sea floor

noun

  1. the solid surface underlying a sea or an ocean.


Etymology

Origin of seafloor

First recorded in 1850–55; sea + floor

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The next step would be to anchor one of the devices to the seafloor for a longer test.

From Los Angeles Times • Jun. 2, 2026

To investigate, researchers used information collected during two major seafloor experiments, one carried out in 2008 and another between 2019 and 2022.

From Science Daily • May 16, 2026

These fossils were recovered from sites in Japan and Vancouver Island, where calm seafloor conditions helped preserve delicate details.

From Science Daily • Apr. 25, 2026

The potato-size polymetallic nodules are found on vast flat areas of the seafloor called abyssal plains.

From The Wall Street Journal • May 17, 2025

After the war, Hess returned to Princeton and the preoccupations of teaching, but the mysteries of the seafloor continued to occupy a space in his thoughts.

From "A Short History of Nearly Everything" by Bill Bryson

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