noun
oceanic ridge; submarine ridge
Geological term for a long, seismically active underwater mountain range, such as the Mid-Atlantic Ridge.
大西洋中央海嶺は世界で最も長い海嶺の一つです。
The Mid-Atlantic Ridge is one of the longest oceanic ridges in the world.
海溝 is an oceanic trench (a deep, narrow depression), whereas 海嶺 is an underwater mountain ridge.
Compound of 海 (kai, 'sea') and 嶺 (rei, 'peak' or 'ridge'). The term is a direct calque from Western geological terminology.