caldera

名词 caldera:

1. a large crater caused by the violent explosion of a volcano that collapses into a depression

cal.de.ra

n.（名词）
A large crater formed by volcanic explosion or by collapse of a volcanic cone.
火山口：火山爆发而形成的环形山或大山核心部分的崩塌而形成的环形山

来源：
Spanish [caldron, caldera]
西班牙语 [大锅，火山口]
from Late Latin cald3ria * see caldron
源自 后期拉丁语 cald3ria *参见 caldron