二に重じゅう式しき火か山ざん

noun

double volcano

A volcano with two peaks or craters, often formed by overlapping volcanic structures. Technical term used in geology.

• 二に重じゅう式しき火か山ざんは、複ふく数すうの火か口こうが重かさなってできた火か山ざんです。

  A double volcano is a volcano formed by overlapping craters.