- a tubelike formation in sand or rock, caused by lightning.
Origin of fulgurite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for fulgurite
This fulgurite, which is extremely light, measures six centimetres in length.Thunder and Lightning
- a tube of glassy mineral matter found in sand and rock, formed by the action of lightning
C19: from Latin fulgur lightning
- A slender, usually tubular body of glassy rock produced by lightning striking and then fusing dry sandy soil.
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