Mid-Atlantic Ridge
[ mid-at-lan-tik, mid-at-lan- ]
/ ˈmɪd ætˈlæn tɪk, ˌmɪd ætˈlæn- /
noun
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.