fulgurite

詳細解釋：

ful.gu.rite

n.（名詞）
A slender, usually tubular body of glassy rock produced by lightning striking and then fusing dry sandy soil.
閃電熔岩：一種因雷擊而熔化於沙土形成的細長的通常為管狀的光滑岩石體

來源：
Latin fulgur [lightning] * see fulgurate
拉丁語 fulgur [閃電] *參見 fulgurate
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