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fulgurite

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Fulgurite

Main Entry:: ful·gu·rite
Pronunciation:: \ˈfu̇l-g(y)ə-ˌrīt, ˈfu̇l-jə-, ˈfəl-\
Function:: noun
Etymology:: International Scientific Vocabulary, from Latin fulgur
Date:: 1834

: an often tubular vitrified crust produced by the fusion of sand or rock by lightning

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