Definition of fulgurite in English:



  • 1Vitreous material formed of sand or other sediment fused by lightning.

    • ‘The clay-soil class of fulgurite, recently discovered in the eastern gold fields of Western Australia, was described as subaerial irregular masses of black glass hosted by clayey soil.’
    • ‘Although the fulgurite has not been completely excavated, the distribution of the branching tubes is dominantly elongate instead of presenting a semiradial dendritic form of energy dissipation known as a lichtenberg pattern.’
    • ‘At the discovery outcrop, the black glass-lined effusion crater with its glassy tendrils marks the transition from subterranean fulgurite tubes to exogenic styles of formation.’
    • ‘Perhaps once this class of exogenic fulgurite becomes better known, a greater number or variety of occurrences will be recognized instead of overlooked.’
    • ‘Armed with rock hammers and shovels, the three geologists began excavating the fulgurite, unaware that what they would eventually uncover would rival the largest fulgurites ever documented.’
    1. 1.1A piece of fulgurite.
      • ‘Without actually seeing the specimen I'd have to say that it does sound like you have a fulgurite.’
      • ‘A 10-foot fulgurite is being prepared for display in the lobby of UF's new engineering building.’
      • ‘After thunderstorms on the Florida coasts beach combers find fulgurite in the sands.’
      • ‘Most people have never seen a fulgurite, and many that have probably did not realize what it was at the time.’


Mid 19th century: from Latin fulgur lightning + -ite.