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seamount

American  
[see-mount] / ˈsiˌmaʊnt /

noun

  1. a submarine mountain rising several hundred fathoms above the floor of the sea but having its summit well below the surface of the water.


seamount British  
/ ˈsiːˌmaʊnt /

noun

  1. a submarine mountain rising more than 1000 metres above the surrounding ocean floor Compare guyot

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

seamount Scientific  
/ sēmount′ /
  1. A large underwater mountain, usually conical in shape and at least 1,000 m (3,280 ft) above the ocean floor. Seamounts are usually isolated and are volcanic in origin.


Etymology

Origin of seamount

First recorded in 1945–50; sea + mount 2

Vocabulary lists containing seamount

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.

See Examples For:

After reviewing the recordings, Judah confirmed that a goblin shark had indeed been captured on video during a livestreamed dive at an unnamed seamount northwest of Jarvis Island.

From Science Daily Jul. 8, 2026

The ship's latest mission focuses on a seamount chain off Indonesia's Sulawesi island that scientists on board mapped last year.

From Barron's Jan. 26, 2026

The ambient temperature of water around the seamount is about 35 degrees Fahrenheit, according to Monterey Bay Aquarium Research Institute scientists.

From Los Angeles Times Aug. 30, 2023

Thousands of deep-sea octopuses gather on the flanks of a seamount off California’s coast.

From Scientific American Aug. 23, 2023

Like a lead blocker ahead of a running back, the seamount shielded a pile of water-logged seafloor sediments nearly 20 kilometers long, keeping it from being scoured away by the top plate.

From Science Magazine Jun. 21, 2023

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