noun
seamount; guyot
Geological term for an underwater mountain, typically of volcanic origin. A guyot is a flat-topped seamount.
太平洋には多くの海山が存在する。
Many seamounts exist in the Pacific Ocean.
この海山は頂上が平らで、ギヨーと呼ばれる。
This seamount has a flat top and is called a guyot.