fulgurite
/ˈfʌlgjʊəraɪt/noun
mass noun
1- Geology vitreous material formed of sand or other sediment fused by lightning【地质】闪电管石, 闪电熔岩。
1.1
- count noun a piece of such material闪电管石块。
词源
mid 19th cent.: from Latin fulgur 'lightning' + -ITE1.