[ 'fʌlgjʊrʌɪt ]
■ noun Geology vitreous material formed of sand or other sediment fused by lightning.
Origin
C19: from L. fulgur 'lightning' + -ite 1 .
FULGURITE
Meaning of FULGURITE in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004