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horse conch

noun

a marine gastropod, Pleuroploca gigantea, having a yellowish, spired shell that grows to a length of 2 feet (0.6 meters).

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Read more in this article about some frequently asked questions and fun facts related to our definitions.

Origin of horse conch

An Americanism dating back to 1865–70

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019