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.

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seamount British  

/ ˈsiːˌmaʊnt /

noun

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

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seamount Scientific  

/ sē′mount′ /

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.

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Etymology

Origin of seamount

First recorded in 1945–50; sea + mount ²

Example Sentences

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

But then, just as Hercules crossed over a ridge, a curious sight floated across the screen: small, almost iridescent bulbs clinging to the seamount wall.

From Los Angeles Times

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

From Scientific American

Notable was not only the seamount itself, but also the shadow it cast.

From Science Magazine

The Connecticut, one of three advanced Seawolf submarines, hit the uncharted seamount on Oct.

From Seattle Times