lava

详细解释:n. 熔岩, 火山岩
【医】 火山石(一种顺势疗法药)

英语解释：

名词 lava:

rock that in its molten form (as magma) issues from volcanos; lava is what magma is called when it reaches the surface

例句：

The volcano spewed molten lava.火山喷出了熔岩。