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fulgurite

[ fuhl-gyuh-rahyt ]

noun

  1. a tubelike formation in sand or rock, caused by lightning.


fulgurite

/ ˈfʌlɡjʊˌraɪt /

noun

  1. a tube of glassy mineral matter found in sand and rock, formed by the action of lightning
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

fulgurite

/ flgyə-rīt′,-gə- /

  1. A slender, usually tubular body of glassy rock produced by lightning striking and then fusing dry sandy soil.
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Word History and Origins

Origin of fulgurite1

1825–35; < Latin fulgur ( fulgurate ) + -ite 1
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Word History and Origins

Origin of fulgurite1

C19: from Latin fulgur lightning
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Example Sentences

I have a lot of material samples, like foams made out of aluminum, and a piece of glass, called fulgurite, that’s made from lightning hitting sand.

Quasicrystals might also form in other materials that were generated in violent conditions, such as fulgurite, the material made when lightning strikes rock, sand or other sediments.

The researchers examined an unusually large and pristine fulgurite sample formed when lightning struck the backyard of a home in Glen Ellyn, Illinois, outside Chicago.

From Reuters

When a lightning bolt strikes a mountaintop, it can melt rocks in a flash, leaving a narrow glassy scar called a fulgurite.

When exposed to the elements, glasses like fulgurite slowly and steadily absorb moisture, “sort of like a sponge,” says Jonathan Castro, a volcanologist at the Johannes Gutenberg University of Mainz.

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