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Mariana Trench

[mair-ee-ah-nuh trench, mar-]

noun

  1. the world’s deepest oceanic trench, a crescent-shaped depression located in the western Pacific Ocean, south and west of the Mariana Islands: site of the Challenger Deep.



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Word History and Origins

Origin of Mariana Trench1

First recorded in 1930–35; named after the Mariana Islands

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Marianas TrenchMarianism