noun
double volcano
A volcano with two peaks or craters, often formed by overlapping volcanic structures. Technical term used in geology.
二重式火山は、複数の火口が重なってできた火山です。
A double volcano is a volcano formed by overlapping craters.
Compound of 二重 (nijū, 'double') + 式 (shiki, 'type') + 火山 (kazan, 'volcano'). The exact historical derivation is uncertain; the term is a modern geological classification.