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Horizon Deep
[ huh-rahy-zuhn deep ]
noun
- the second-deepest known portion of seafloor in the world, located in the South Pacific Ocean’s Tonga Trench at a depth of 35,509 feet (10,823 meters). Compare Challenger Deep ( def ), Emden Deep ( def ).
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Word History and Origins
Origin of Horizon Deep1
First recorded in 1950–55; named after the research vessel Horizon of the Scripps Institution of Oceanography, which discovered the deep in 1952
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