Seamount definition

sēmount
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An underwater mountain rising from the ocean floor and having a peaked or flat-topped summit below the surface of the sea.
noun
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A mountain rising from the sea floor but not reaching the surface.
noun
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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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A mountain that rises from the floor of the ocean and does not breach the water's surface.
noun
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Other Word Forms

Noun

Singular:
seamount
Plural:
seamounts