[ mid-at-lan-tik, mid-at-lan- ]
/ ˈmɪd ætˈlæn tɪk, ˌmɪd ætˈlæn- /
a north-south suboceanic ridge in the Atlantic Ocean from Iceland to Antarctica on whose crest are several groups of islands; shown by plate tectonics to be the axis along which North America has split away from Eurasia, and along which South America has split away from Africa.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020