lava
//ˈlɑː.və//
Noun
lavaSingular
lavasPlural
1
Hot molten or semi-fluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.
The lava flowed down the side of the volcano.
2
The rock formed when molten lava cools and solidifies.
The island is covered with black lava from ancient eruptions.