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oceanic trench
[ oh-shee-an-ik trench ]
noun
- a depression of significant depth in the ocean floor, usually about 2.0–2.5 miles (3–4 kilometers) deeper than the surface of the surrounding seafloor and about 30–60 miles (50–100 kilometers) wide, with a length that may span thousands of miles or kilometers: an integral element of plate tectonics.
oceanic trench
noun
- a long narrow steep-sided depression in the earth's oceanic crust, usually lying above a subduction zone
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Word History and Origins
Origin of oceanic trench1
First recorded in 1945–50
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[ab-skwoch-uh-leyt ]
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