dome
US /doʊm/
UK /doʊm/

1.
2.
穹, 圆顶结构
a natural or artificial structure or formation that is rounded on top
:
•
The geological survey identified a salt dome in the region.
地质调查在该地区发现了一个盐穹。
•
The ice dome formed over the volcanic crater.
冰穹形成于火山口上方。