fulguritePronunciation: /ˈfʌlgjʊrʌɪt/Definition of fulgurite noun [mass noun] Geology vitreous material formed of sand or other sediment fused by lightning. [count noun] a piece of fulgurite. Origin: mid 19th century: from Latin fulgur 'lightning' + -ite1fulgurite in other Oxford dictionaries Definition of fulgurite in the US English dictionary
