mid-atlantic ridge

Noun
  1. A very long narrow elevation on the ocean floor that runs all the way from Iceland in the North Atlantic to Bouvet Island in the South Atlantic (synset 109377180)
    is an instance of: ridge - a long narrow natural elevation on the floor of the ocean
    is a part of: atlantic, atlantic ocean - the 2nd largest ocean; separates North and South America on the west from Europe and Africa on the east

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