( n. )
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.
( n. )
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.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012