mid-ocean ridge
[ mid-oh-shuhn ]
/ ˈmɪdˌoʊ ʃən /
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noun
any of several seismically active submarine mountain ranges that extend through the Atlantic, Indian, and South Pacific oceans: each is hypothesized to be the locus of seafloor spreading.
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Let’s start with some etymology: What are the origins of the typographical word “bracket”?
First appeared around 1750, and is related to the French word “braguette” for the name of codpiece armor.
First appeared in 1610, based on the French word “baguette” for the long loaf of bread.
First appeared in 1555, and is related to the French word “raquette” for a netted bat.
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Origin of mid-ocean ridge
First recorded in 1960–65
Words nearby mid-ocean ridge
midnight, midnight blue, midnight oil, midnight sun, midnoon, mid-ocean ridge, mid off, mid on, midpoint, midrange, midrash
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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Scientific definitions for mid-ocean ridge
mid-ocean ridge
[ mĭd′ō′shən ]
A long mountain range on the ocean floor, extending almost continuously through the North and South Atlantic Oceans, the Indian Ocean, and the South Pacific Ocean. A deep rift valley is located at its center, from which magma flows and forms new oceanic crust. As the magma cools and hardens it becomes part of the mountain range. The mid-ocean ridge is approximately 1,500 km (930 mi) wide, 1 to 3 km (0.62 to 1.86 mi) high, and over 84,000 km (52, 080 mi) long. See more at sea-floor spreading.
The American Heritage® Science Dictionary
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