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Webster's 1913 Dictionary

FULGURITE

Ful "gu *rite, n. Etym: [L. fulguritus, p. p. of fulgurire to strike with lightning, fr. fulgur lightning: cf. F. fulgurite. ]

 

Defn: A vitrified sand tube produced by the striking of lightning on sand; a lightning tube; also, the portion of rock surface fused by a lightning discharge.

 

New American Oxford Dictionary

fulgurite

ful gu rite |ˈfo͝olg (y )əˌrīt ˈfʊlgjəraɪt | ▶noun Geology vitreous material formed of sand or other sediment fused by lightning. • a piece of such material. ORIGIN mid 19th cent.: from Latin fulgur ‘lightning ’ + -ite 1 .

 

Oxford Dictionary

fulgurite

fulgurite |ˈfʌlgjʊrʌɪt | ▶noun [ mass noun ] Geology vitreous material formed of sand or other sediment fused by lightning. • [ count noun ] a piece of fulgurite. ORIGIN mid 19th cent.: from Latin fulgur ‘lightning ’ + -ite 1 .